feat(tenant): suppress creating the default namespace automatically

[xdlbdy]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

[codecov]

Codecov Report

Merging #623 (9e2828f) into main (ee76217) will decrease coverage by 3.19%.
Report is 85 commits behind head on main.
The diff coverage is 46.79%.

@@            Coverage Diff             @@
##             main     #623      +/-   ##
==========================================
- Coverage   57.07%   53.88%   -3.19%     
==========================================
  Files         190      225      +35     
  Lines       15191    18160    +2969     
==========================================
+ Hits         8670     9786    +1116     
- Misses       5884     7581    +1697     
- Partials      637      793     +156     

Files Changed	Coverage
internal/controller/trigger/storage/storage.go	ø
...rnal/controller/trigger/validation/subscription.go	ø
internal/controller/trigger/worker/manager.go	ø
internal/controller/trigger/worker/policy.go	ø
internal/controller/trigger/worker/scheduler.go	ø
internal/controller/trigger/worker/worker.go	ø
internal/gateway/config.go	ø
internal/gateway/gateway.go	ø
internal/gateway/proxy/auth.go	ø
internal/gateway/proxy/deadletter.go	ø
... and 68 more

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