feat: adding samples for default values

[m-strzelczyk]

Featuring the usage report API.

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[snippet-bot]

Here is the summary of changes.

You are about to add 7 region tags.

• samples/snippets/sample_default_values.py:20, tag compute_instances_verify_default_value
• samples/snippets/sample_default_values.py:21, tag compute_usage_report_set
• samples/snippets/sample_default_values.py:22, tag compute_usage_report_get
• samples/snippets/sample_default_values.py:23, tag compute_usage_report_disable
• samples/snippets/sample_default_values.py:30, tag compute_usage_report_set
• samples/snippets/sample_default_values.py:66, tag compute_usage_report_get
• samples/snippets/sample_default_values.py:100, tag compute_usage_report_disable

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