Source Override does not work for AWS Gov Cloud

When try to use `sourceLocationOverride` with AWS Gov Cloud bucket the build fail with the message below.

```
com.amazonaws.services.s3.model.AmazonS3Exception: The specified bucket is not valid. (Service: Amazon S3; Status Code: 400; Error Code: InvalidBucketName; S3 Extended Request ID; Proxy: ), S3 Extended Request ID:
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1879)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleServiceErrorResponse(AmazonHttpClient.java:1418)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1387)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1157)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:814)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:781)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:755)
at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:715)
at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:697)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:561)
at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:541)
at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:5453)
at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:5400)
at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:5394)
at com.amazonaws.services.s3.AmazonS3Client.getBucketVersioningConfiguration(AmazonS3Client.java:2447)
at com.amazonaws.services.s3.AmazonS3Client.getBucketVersioningConfiguration(AmazonS3Client.java:2431)
at CodeBuilderValidation.checkBucketIsVersioned(CodeBuilderValidation.java:224)
at CodeBuilder.perform(CodeBuilder.java:417)
at CodeBuilder.perform(CodeBuilder.java:261)
at CodeBuildStep$CodeBuildExecution.run(CodeBuildStep.java:650)
at CodeBuildStep$CodeBuildExecution.run(CodeBuildStep.java:610)
at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1$1.call(AbstractSynchronousNonBlockingStepExecution.java:47)
at hudson.security.ACL.impersonate2(ACL.java:451)
at hudson.security.ACL.impersonate(ACL.java:463)
at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1.run(AbstractSynchronousNonBlockingStepExecution.java:44)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
```

Start at CodeBuilderValidation.checkBucketIsVersioned, where the stack trace shows the failure, and trace how sourceLocationOverride reaches the AWS S3 client through CodeBuilder.perform. Reproduce the build with an AWS GovCloud bucket and compare it with a standard AWS bucket. Done means the overridden GovCloud source is accepted without InvalidBucketName while the existing versioning validation still works.

Written by the indexing model from the issue text.