feat(storagecontrol): add folder samples

[cojenco]

Tests depends on next release googleapis/python-storage#1256

Adds folders create/get/list/rename/delete samples

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• Tests pass: nox -s py-3.8 Note: tests are ran in 3.8 and 3.10 test projects that are allowlisted
• Lint pass: nox -s lint (see Test Environment Setup)
• Please merge this PR for me once it is approved

[snippet-bot]

Here is the summary of changes.

You are about to add 5 region tags.

• storagecontrol/create_folder.py:17, tag storage_control_create_folder
• storagecontrol/delete_folder.py:17, tag storage_control_delete_folder
• storagecontrol/get_folder.py:17, tag storage_control_get_folder
• storagecontrol/list_folders.py:17, tag storage_control_list_folders
• storagecontrol/rename_folder.py:17, tag storage_control_rename_folder

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