feat: add Autoclass support and sample

[JesseLovelace]

#1598

Adds support and samples for Autoclass

[snippet-bot]

Here is the summary of changes.

You are about to add 2 region tags.

• samples/snippets/src/main/java/com/example/storage/bucket/GetBucketAutoclass.java:19, tag storage_get_autoclass
• samples/snippets/src/main/java/com/example/storage/bucket/SetBucketAutoclass.java:19, tag storage_set_autoclass

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[conventional-commit-lint-gcf]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

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[BenWhitehead]

A few minor things to address. Thanks for adding this!

[BenWhitehead]

I almost forgot, can you also add the new Storage.BucketField.AUTOCLASS enum to allow specifically selecting it (and update the field tests in ITOptionRegressionTest accordingly)?

[JesseLovelace]

It appears to already be there?
https://github.com/googleapis/java-storage/blob/feat/grpc-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/Storage.java#L151

java-storage/google-cloud-storage/src/test/java/com/google/cloud/storage/it/ITOptionRegressionTest.java

Line 326 in e6b12a7

"autoclass",

[BenWhitehead]

Ah, you're right. Thanks for double checking.

[cojenco]

Update: per offline discussion, GA is tentatively postponed to Nov 7 as the backend team is monitoring feature and UI rollout. I will comment once the timeline is confirmed.

Additionally, samples tests are pending feature complete rollout or for the newly added samples project to be allowlisted

[cojenco]

Ready to merge and release, thank you!