PR Checks: disable tests for Swift on Linux until CLI 2.17.4

pr-checks/checks/multi-language-autodetect.yml

@@ -1,6 +1,7 @@
 name: "Multi-language repository"
 description: "An end-to-end integration test of a multi-language repository using automatic language detection"
-operatingSystems: ["ubuntu", "macos"]
+# TODO: Add ubuntu back for `nightly-latest` and `latest` once CLI v2.17.4 is available.
+operatingSystems: ["macos"] 
 steps:
   - uses: actions/setup-go@v5
     with:

pr-checks/checks/scaling-reserved-ram.yml

@@ -1,6 +1,7 @@
 name: "Scaling reserved RAM"
 description: "An end-to-end integration test of a multi-language repository with the scaling_reserved_ram feature flag enabled"
-operatingSystems: ["ubuntu", "macos"]
+# TODO: Add ubuntu back for `nightly-latest` and `latest` once CLI v2.17.4 is available.
+operatingSystems: ["macos"]
 env:
   CODEQL_ACTION_SCALING_RESERVED_RAM: true
 steps:

pr-checks/checks/swift-custom-build.yml

@@ -1,7 +1,8 @@
 name: "Swift analysis using a custom build command"
 description: "Tests creation of a Swift database using custom build"
 versions: ["latest", "default", "nightly-latest"]
-operatingSystems: ["ubuntu", "macos"]
+# TODO: Add ubuntu back for `nightly-latest` and `latest` once CLI v2.17.4 is available.
+operatingSystems: ["macos"] 
 env:
   DOTNET_GENERATE_ASPNET_CERTIFICATE: "false"
 steps:

pr-checks/checks/unset-environment.yml

@@ -1,6 +1,6 @@
 name: "Test unsetting environment variables"
 description: "An end-to-end integration test that unsets some environment variables"
-operatingSystems: ["ubuntu"]
+operatingSystems: ["macos"] # TODO: Switch back to ubuntu for `nightly-latest` and `latest` once CLI v2.17.4 is available.
 steps:
   - uses: ./../action/init
     id: init