feat: enhance log subscription verification to include destination ARN

[Sashwatdas123]

Details:

• Fixed bug where subscriptions install ignored destination ARN changes, only checking filter pattern
• Added destination_Arn comparison to conditions in create_log_subscription() and create_otel_log_subscription()
• Enables seamless migration of subscriptions between log ingestion stacks without workarounds

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.86%. Comparing base (a7309f0) to head (bbe0673).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #366   +/-   ##
=======================================
  Coverage   69.86%   69.86%           
=======================================
  Files          20       20           
  Lines        1858     1858           
=======================================
  Hits         1298     1298           
  Misses        560      560           

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