Add PAUSE/RESUME/DROP TRIGGER support for TableTriggers

[srnand]

Summary

• Added implementation for SQL commands to pause, resume and drop TableTriggers.
• When paused, triggers will not create new jobs, but existing jobs will complete gracefully.
• Added paused boolean field to TableTrigger CRD spec.
• Updated TableTriggerReconciler to check spec.paused flag early in reconciliation
  • When paused=true:
    • Prevents creation of new jobs (scheduled or watermark-based)
    • Continues monitoring existing jobs to allow graceful completion
    • Updates watermarks for completed jobs
  • When paused=false: Normal trigger operation resumes

Test

• Added UTs for reconciliation.
• Added Integration testing queries for new pause/resume/drop trigger sql.
  • (DONE) Need to add DROP TRIGGER support for the integration test to pass.

[ryannedolan]

wow! Nice work!