feat: move unit tests from Circleci to Github actions (#25570)

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## **Description**

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1. What is the reason for the change?
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[![Open in GitHub
Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/MetaMask/metamask-extension/pull/25570?quickstart=1)

This PR moves unit tests from Circleci to Github actions. This is needed
to pass the Jest export to SonarCloud in order finalize the SonarCloud
integration. The reason why we want to use Github action rather than
Circleci is because Sonarcloud integration happens in a Github action
and we cannot pass data (i.e. the artifact) from Circleci to Github
action.

## **Related issues**

Fixes: MetaMask/MetaMask-planning#2449

## **Manual testing steps**

1. Seeing unit tests pass in GitHub actions instead of Circleci

## **Screenshots/Recordings**

Not applicable

## **Pre-merge author checklist**

- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I’ve included tests if applicable
- [x] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

Author: itsyoboieltr

.circleci/config.yml

@@ -252,16 +252,6 @@ workflows:
                 - /^Version-v(\d+)[.](\d+)[.](\d+)/
           requires:
             - prep-build
-      - test-unit-jest-main:
-          requires:
-            - prep-deps
-      - test-unit-jest-development:
-          requires:
-            - prep-deps
-      - upload-coverage:
-          requires:
-            - test-unit-jest-main
-            - test-unit-jest-development
       - test-unit-global:
           requires:
             - prep-deps
@@ -305,10 +295,7 @@ workflows:
             - test-lint-shellcheck
             - test-lint-lockfile
             - test-lint-changelog
-            - test-unit-jest-main
-            - test-unit-jest-development
             - test-unit-global
-            - upload-coverage
             - validate-source-maps
             - validate-source-maps-beta
             - validate-source-maps-flask
@@ -1630,9 +1617,6 @@ jobs:
           path: builds-test
       - store_artifacts:
           path: builds-test-flask
-      - store_artifacts:
-          path: coverage
-          destination: coverage
       - store_artifacts:
           path: test-artifacts
           destination: test-artifacts
@@ -1713,54 +1697,6 @@ jobs:
             git config user.email metamaskbot@users.noreply.github.com
             yarn ts-migration:dashboard:deploy
 
-  test-unit-jest-development:
-    executor: node-browsers-small
-    steps:
-      - run: *shallow-git-clone
-      - run: sudo corepack enable
-      - attach_workspace:
-          at: .
-      - run:
-          name: jest development unit tests
-          command: yarn test:coverage:jest:dev
-      - persist_to_workspace:
-          root: .
-          paths:
-            - coverage
-      - store_test_results:
-          path: test/test-results/junit.xml
-
-  test-unit-jest-main:
-    executor: node-browsers-medium-plus
-    parallelism: 8
-    steps:
-      - run: *shallow-git-clone
-      - run: sudo corepack enable
-      - attach_workspace:
-          at: .
-      - run:
-          name: test:coverage:jest
-          command: yarn test:coverage:jest
-      - persist_to_workspace:
-          root: .
-          paths:
-            - coverage
-      - store_test_results:
-          path: test/test-results/junit.xml
-
-  upload-coverage:
-    executor: node-browsers-small
-    steps:
-      - run: *shallow-git-clone
-      - run: sudo corepack enable
-      - attach_workspace:
-          at: .
-      - codecov/upload
-      - persist_to_workspace:
-          root: .
-          paths:
-            - coverage
-
   test-unit-global:
     executor: node-browsers-small
     steps:

.github/actions/setup-environment/action.yml

@@ -0,0 +1,17 @@
+name: 'Setup environment'
+description: 'Setup environment'
+runs:
+  using: 'composite'
+  steps:
+    - run: corepack enable
+      shell: bash
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version-file: '.nvmrc'
+        cache: yarn
+
+    - name: Install dependencies
+      run: yarn --immutable
+      shell: bash

.github/workflows/run-unit-tests.yml

@@ -0,0 +1,32 @@
+# WARNING! It is currently being investigated how to make this faster
+# DO NOT blindly copy this workflow, not noticing the slow down,
+# because suddenly our tests will take hours to pass CI.
+# Hopefully this comment here will help prevent that.
+# https://github.com/MetaMask/metamask-extension/issues/25680
+
+name: Run unit tests
+
+on:
+  pull_request:
+    types: [opened,reopened,synchronize]
+
+jobs:
+  test-unit-jest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-environment
+
+      - name: test:coverage:jest:dev
+        run: yarn test:coverage:jest:dev
+
+      - name: test:coverage:jest
+        run: yarn test:coverage:jest
+
+      - uses: codecov/codecov-action@e28ff129e5465c2c0dcc6f003fc735cb6ae0c673
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true