Test Linux against Swift 5.7

Currently only macOS supports 5.7.1

Author: henrymercer

.github/workflows/__export-file-baseline-information.yml

@@ -3,7 +3,8 @@ description: "Tests that file baseline information is exported when the feature
 versions: ["nightly-latest"]
 steps:
   - uses: swift-actions/setup-swift@5cdaa9161ad1f55ae39a5ea1784ef96de72f95d9
-    if: runner.os != 'Windows' && matrix.version == 'cached'
+    # Windows doesn't support Swift, and only macOS latest and nightly-latest support Swift 5.7.1.
+    if: runner.os == 'Linux' || (runner.os == 'macOS' && matrix.version == 'cached')
     with:
       swift-version: "5.7"
   - uses: ./../action/init

.github/workflows/__multi-language-autodetect.yml

@@ -5,7 +5,8 @@ env:
   CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT: "true" # Remove when Swift is GA.
 steps:
   - uses: swift-actions/setup-swift@5cdaa9161ad1f55ae39a5ea1784ef96de72f95d9
-    if: matrix.version == 'cached'
+    # Only macOS latest and nightly-latest support Swift 5.7.1
+    if: runner.os == 'Linux' || matrix.version == 'cached'
     with:
       swift-version: "5.7"
 

.github/workflows/__swift-autobuild.yml

@@ -7,7 +7,8 @@ env:
   CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT: "true"
 steps:
   - uses: swift-actions/setup-swift@5cdaa9161ad1f55ae39a5ea1784ef96de72f95d9
-    if: matrix.version == 'cached'
+    # Only macOS latest and nightly-latest support Swift 5.7.1
+    if: runner.os == 'Linux' || matrix.version == 'cached'
     with:
       swift-version: "5.7"
   - uses: ./../action/init

.github/workflows/__swift-custom-build.yml

@@ -7,7 +7,8 @@ env:
   DOTNET_GENERATE_ASPNET_CERTIFICATE: "false"
 steps:
   - uses: swift-actions/setup-swift@5cdaa9161ad1f55ae39a5ea1784ef96de72f95d9
-    if: matrix.version == 'cached'
+    # Only macOS latest and nightly-latest support Swift 5.7.1
+    if: runner.os == 'Linux' || matrix.version == 'cached'
     with:
       swift-version: "5.7"
   - uses: ./../action/init