samples(storage batch operations): add samples and tests for storage batch operations

[mahendra-google]

This PR contains samples and test cases to create, list, get, cancel and delete storage batch job operations.

The region tags used to create samples are as below:-

• [ ] 1. storage_batch_create_job

• [ ] 2. storage_batch_list_jobs

• [ ] 3. storage_batch_get_job
• [ ] 4. storage_batch_cancel_job
• [ ] 5. storage_batch_delete_job

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 5 region tags.

• storagebatchoperations/api/StorageBatchOperations.Samples/CancelBatchJob.cs:15, tag storage_batch_cancel_job
• storagebatchoperations/api/StorageBatchOperations.Samples/CreateBatchJob.cs:15, tag storage_batch_create_job
• storagebatchoperations/api/StorageBatchOperations.Samples/DeleteBatchJob.cs:15, tag storage_batch_delete_job
• storagebatchoperations/api/StorageBatchOperations.Samples/GetBatchJob.cs:15, tag storage_batch_get_job
• storagebatchoperations/api/StorageBatchOperations.Samples/ListBatchJobs.cs:15, tag storage_batch_list_jobs

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[mahendra-google]

@purva9413 After looking at errors from build log , I think Storage Batch Operations APIs are not enabled on both Kokoro servers i.e. Kokoro CI Linux 3 and Kokoro CI Windows 3.

[purva9413]

The API has been enabled but there are failing tests. Please take a look and also please address comments from the review. Thanks!

[mahendra-google]

@purva9413 This test is not failing locally. Could you add kokoro label once I have done some code changes?

[mahendra-google]

@purva9413 Could you add kokoro label again?. This time I have added the null-conditional operator (?.) for all retrievedResponse properties and also added console logs to print those individual values to find exactly which value is null.

[mahendra-google]

@purva9413 This PR is ready for review.

[mahendra-google]

@purva9413 Could you review the retry logic implemented as a part of the recent code changes, with reference to the IAM pull request?

[purva9413]

Please fix failing tests.

[mahendra-google]

@purva9413 Could you add once kokoro label? I want to check if the test is failing or not ?

[mahendra-google]

@purva9413 Gentle Reminder , This PR is ready for re-review

[purva9413]

Tests are still failing, please fix.

[mahendra-google]

@purva9413 Could you add kokoro label again?.

[mahendra-google]

@purva9413 Gentle Reminder PR is ready for re-review