Fix support for amazonlinux2 with the swift_package_test workflow

checkout@v4 requires a version of node that requires a newer version of glibc than exists on this OS version, so downgrade it to v3 for AL2.

Author: jakepetroules

.github/workflows/pull_request.yml

@@ -24,7 +24,7 @@ jobs:
     uses: ./.github/workflows/swift_package_test.yml
     with:
       # Linux
-      linux_os_versions: '["jammy", "rhel-ubi9"]'
+      linux_os_versions: '["jammy", "rhel-ubi9", "amazonlinux2"]'
       linux_build_command: |
         mkdir MyPackage
         cd MyPackage

.github/workflows/swift_package_test.yml

@@ -200,6 +200,10 @@ jobs:
         run: swift --version
       - name: Checkout repository
         uses: actions/checkout@v4
+        if: ${{ matrix.os_version != 'amazonlinux2' }}
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        if: ${{ matrix.os_version == 'amazonlinux2' }}
       - name: Provide token
         if: ${{ inputs.needs_token }}
         run: |
@@ -232,6 +236,10 @@ jobs:
         run: swift --version
       - name: Checkout repository
         uses: actions/checkout@v4
+        if: ${{ matrix.os_version != 'amazonlinux2' }}
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        if: ${{ matrix.os_version == 'amazonlinux2' }}
       - name: Provide token
         if: ${{ inputs.needs_token }}
         run: |
@@ -272,6 +280,10 @@ jobs:
         run: swift --version
       - name: Checkout repository
         uses: actions/checkout@v4
+        if: ${{ matrix.os_version != 'amazonlinux2' }}
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        if: ${{ matrix.os_version == 'amazonlinux2' }}
       - name: Provide token
         if: ${{ inputs.needs_token }}
         run: |