docs: add Admin API samples for property user link management methods

[ikuleshov]

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Fixes #<issue_number_goes_here> 🦕

[snippet-bot]

Here is the summary of changes.

You are about to add 10 region tags.

• samples/properties_user_links_audit.py:23, tag analyticsadmin_properties_user_links_audit
• samples/properties_user_links_batch_create.py:23, tag analyticsadmin_properties_user_links_batch_create
• samples/properties_user_links_batch_delete.py:23, tag analyticsadmin_properties_user_links_batch_delete
• samples/properties_user_links_batch_get.py:23, tag analyticsadmin_properties_user_links_batch_get
• samples/properties_user_links_batch_update.py:23, tag analyticsadmin_properties_user_links_batch_update
• samples/properties_user_links_create.py:23, tag analyticsadmin_properties_user_links_create
• samples/properties_user_links_delete.py:23, tag analyticsadmin_properties_user_links_delete
• samples/properties_user_links_get.py:23, tag analyticsadmin_properties_user_links_get
• samples/properties_user_links_list.py:23, tag analyticsadmin_properties_user_links_list
• samples/properties_user_links_update.py:23, tag analyticsadmin_properties_user_links_update

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[ikuleshov]

Region tag product prefix check is failing due to the product set as non-public in https://devrel.corp.google.com/admin/products/401. This is something that we are currently working on, but I believe the region prefixes are fine.

[busunkim96]

The test files seem to be missing copyright years in the license header.

[busunkim96]

Missing copyright year

[ikuleshov]

Done

[busunkim96]

Missing copyright year

[ikuleshov]

Done

[busunkim96]

Missing copyright year

[ikuleshov]

Done

[busunkim96]

Missing copyright year

[busunkim96]

Missing copyright year

[busunkim96]

Missing copyright year

[busunkim96]

How are these samples going to be presented in the documentation? Cloud code snippets normally don't import functions from other files since they are intended to be copy-paste runnable.

[ikuleshov]

This is a good question. I updated samples to just use print() to output the raw response proto, which does the job just fine, and removes dependencies between samples. Samples for *get() operations (e.g. properties_user_links_get) still have a proper print method that demonstrates how to access and print individual fields of the response.