feat(storage): add bucket IP filtering samples and tests

[nidhiii-27]

Add Python code samples and tests demonstrating Cloud Storage Bucket IP filtering.

Fixes: b/544985518

[Generated-by: AI]

[gemini-code-assist]

Code Review

This pull request introduces Python code snippets and tests demonstrating Google Cloud Storage bucket IP filtering features, including creating, enabling, disabling, retrieving, listing, and deleting IP filtering rules. The review feedback highlights several potential bugs and improvement opportunities: handling potential IndexError exceptions when executing the scripts from the command line without arguments, defensively checking for None values to avoid TypeError exceptions on list operations, and refactoring direct self-assignments to prevent linter warnings or accidental code removal that would break the SDK's change registration.

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• storage/samples/snippets/storage_create_bucket_ip_filtering.py:19, tag storage_create_bucket_ip_filtering
• storage/samples/snippets/storage_delete_ip_filtering_rules.py:19, tag storage_delete_ip_filtering_rules
• storage/samples/snippets/storage_disable_ip_filtering.py:19, tag storage_disable_ip_filtering
• storage/samples/snippets/storage_enable_ip_filtering.py:19, tag storage_enable_ip_filtering
• storage/samples/snippets/storage_get_ip_filtering.py:19, tag storage_get_ip_filtering
• storage/samples/snippets/storage_list_buckets_ip_filtering.py:17, tag storage_list_buckets_ip_filtering

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