Add tags to instance pool and default tags to cluster table

[sudharshanraja-db]

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closes #492
closes #430

[GeekSheikh]

confirmed, default_tags is not published by clusters service either. In fact, it appears that default_tags are not published to audit logs for any services -- confirmed by the snippet below.

display(
  table("overwatch_global_etl.audit_log_bronze")
    .filter($"requestParams.default_tags".isNotNull)
    .select('serviceName, 'actionName).distinct
)

[sonarqubecloud[bot]]

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15.6% Duplication