feat(vpcgw): add support for triggering ssh keys refresh

[yfodil]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 40.00000% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 71.22%. Comparing base (fe86049) to head (3fd1d2b).
Report is 56 commits behind head on master.

Files	Patch %	Lines
internal/services/vpcgw/public_gateway.go	40.00%	7 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2567      +/-   ##
==========================================
- Coverage   71.43%   71.22%   -0.22%     
==========================================
  Files         277      329      +52     
  Lines       35875    33029    -2846     
==========================================
- Hits        25628    23525    -2103     
+ Misses       8028     7226     -802     
- Partials     2219     2278      +59     

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