feat: Introduce Quotas

[ajupazhamayil]

PiperOrigin-RevId: 575875836

b/307334339

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• Quotas/samples/V1/CloudQuotasClient/create_quota_preference.php:25, tag cloudquotas_v1_generated_CloudQuotas_CreateQuotaPreference_sync
• Quotas/samples/V1/CloudQuotasClient/get_quota_info.php:25, tag cloudquotas_v1_generated_CloudQuotas_GetQuotaInfo_sync
• Quotas/samples/V1/CloudQuotasClient/get_quota_preference.php:25, tag cloudquotas_v1_generated_CloudQuotas_GetQuotaPreference_sync
• Quotas/samples/V1/CloudQuotasClient/list_quota_infos.php:25, tag cloudquotas_v1_generated_CloudQuotas_ListQuotaInfos_sync
• Quotas/samples/V1/CloudQuotasClient/list_quota_preferences.php:25, tag cloudquotas_v1_generated_CloudQuotas_ListQuotaPreferences_sync
• Quotas/samples/V1/CloudQuotasClient/update_quota_preference.php:25, tag cloudquotas_v1_generated_CloudQuotas_UpdateQuotaPreference_sync

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[ajupazhamayil]

Closing this PR as the API is not yet publicly available.