Enable Swift 6.2 jobs in CI (#129)

Motivation:

Swift 6.2 has been released, we should add it to our CI coverage.

Modifications:

Add additional Swift 6.2 jobs where appropriate in main.yml,
pull_request.yml

Result:

Improved test coverage.

.github/workflows/main.yml

@@ -15,6 +15,7 @@ jobs:
       linux_5_10_enabled: false
       linux_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
       linux_6_1_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
+      linux_6_2_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
       linux_nightly_next_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
       linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
 

.github/workflows/pull_request.yml

@@ -24,6 +24,7 @@ jobs:
       linux_5_10_enabled: false
       linux_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
       linux_6_1_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
+      linux_6_2_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
       linux_nightly_next_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"
       linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -warnings-as-errors -Xswiftc -require-explicit-availability"