samples(storage): add samples and test cases for storage to support bucket restore feature

[mahendra-google]

PR supports list soft deleted bucket, restore soft deleted bucket, get soft deleted bucket samples and test cases.

• 1. Addition of sample and test case to list soft deleted bucket (storage_list_soft_deleted_buckets)
• 2. Addition of sample and test case to restore soft deleted bucket (storage_restore_bucket)
• 3. Addition of sample and test case to get soft deleted bucket (storage_get_soft_deleted_bucket)

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• storage/api/Storage.Samples/GetSoftDeletedBucket.cs:15, tag storage_get_soft_deleted_bucket
• storage/api/Storage.Samples/ListSoftDeletedBuckets.cs:15, tag storage_list_soft_deleted_buckets
• storage/api/Storage.Samples/RestoreSoftDeletedBucket.cs:15, tag storage_restore_bucket

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[amanda-tarafa]

Tests are failing to build:

/tmpfs/src/github/dotnet-docs-samples/storage/api/Storage.Samples.Tests/RestoreBucketTest.cs(37,109): error CS1503: Argument 2: cannot convert from 'long?' to 'long' [/tmpfs/src/github/dotnet-docs-samples/storage/api/Storage.Samples.Tests/Storage.Samples.Tests.csproj]

[mahendra-google]

Tests are failing to build:

/tmpfs/src/github/dotnet-docs-samples/storage/api/Storage.Samples.Tests/RestoreBucketTest.cs(37,109): error CS1503: Argument 2: cannot convert from 'long?' to 'long' [/tmpfs/src/github/dotnet-docs-samples/storage/api/Storage.Samples.Tests/Storage.Samples.Tests.csproj]

@amanda-tarafa Test case updated

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[mahendra-google]

@amanda-tarafa Test CopyFileArchivedGenerationTest is passing locally for me which is failing in Kokoro Windows 3.

  at CopyFileArchivedGenerationTest.CopyFileArchivedGeneration() in C:\tmpfs\src\github\dotnet-docs-samples\storage\api\Storage.Samples.Tests\CopyFileArchivedGenerationTest.cs:line 66 

[amanda-tarafa]

@amanda-tarafa Test CopyFileArchivedGenerationTest is passing locally for me which is failing in Kokoro Windows 3.

  at CopyFileArchivedGenerationTest.CopyFileArchivedGeneration() in C:\tmpfs\src\github\dotnet-docs-samples\storage\api\Storage.Samples.Tests\CopyFileArchivedGenerationTest.cs:line 66 

Yes, don't worry, this is a known flake that we are tracking in #1563