Revert "chore(deps): bump MetaMask/action-checkout-and-setup from 2 to 3 (#8047)" (#8055)

This reverts commit 0e1e911.

## Explanation

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## References

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## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/processes/updating-changelogs.md)
- [ ] I've introduced [breaking
changes](https://github.com/MetaMask/core/tree/main/docs/processes/breaking-changes.md)
in this PR and have prepared draft pull requests for clients and
consumer packages to resolve them

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: this only changes GitHub Actions workflow dependencies, but
it can affect CI/release/publish behavior if v2 differs from v3.
> 
> **Overview**
> Reverts all CI and release GitHub Actions workflows back from
`MetaMask/action-checkout-and-setup@v3` to `@v2` (including label-check,
lint/build/test, preview publish, and release publish pipelines).
> 
> No other workflow logic changes are included; the functional impact is
limited to whatever behavior differs between the action versions.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
50a194a. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: cryptodev-2s

.github/workflows/ensure-blocking-pr-labels-absent.yml

@@ -16,7 +16,7 @@ jobs:
       pull-requests: read
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
       - name: Run command

.github/workflows/lint-build-test.yml

@@ -14,7 +14,7 @@ jobs:
       child-workspace-package-names: ${{ steps.workspace-package-names.outputs.child-workspace-package-names }}
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
           cache-node-modules: true
@@ -34,7 +34,7 @@ jobs:
         node-version: [22.x]
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
           node-version: ${{ matrix.node-version }}
@@ -57,7 +57,7 @@ jobs:
         package-name: ${{ fromJson(needs.prepare.outputs.child-workspace-package-names) }}
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
           node-version: ${{ matrix.node-version }}
@@ -79,7 +79,7 @@ jobs:
         node-version: [22.x]
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
           node-version: ${{ matrix.node-version }}
@@ -101,7 +101,7 @@ jobs:
         node-version: [22.x]
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
           node-version: ${{ matrix.node-version }}
@@ -124,7 +124,7 @@ jobs:
         package-name: ${{ fromJson(needs.prepare.outputs.child-workspace-package-names) }}
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: false
           node-version: ${{ matrix.node-version }}

.github/workflows/publish-preview.yml

@@ -33,7 +33,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PR_NUMBER: ${{ github.event.issue.number }}
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: true
       - name: Get commit SHA
@@ -65,7 +65,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: true
       - name: Restore build artifacts

.github/workflows/publish-release.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: true
       - uses: MetaMask/action-publish-release@v3
@@ -38,7 +38,7 @@ jobs:
     needs: publish-release
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: true
           ref: ${{ github.sha }}
@@ -59,7 +59,7 @@ jobs:
     needs: publish-npm-dry-run
     steps:
       - name: Checkout and setup environment
-        uses: MetaMask/action-checkout-and-setup@v3
+        uses: MetaMask/action-checkout-and-setup@v2
         with:
           is-high-risk-environment: true
           ref: ${{ github.sha }}