refactor(api): add gateway deprecation notice

[walldiss]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 45.29%. Comparing base (2469e7a) to head (750e7f8).
Report is 359 commits behind head on main.

Files with missing lines	Patch %	Lines
nodebuilder/gateway/module.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3869      +/-   ##
==========================================
+ Coverage   44.83%   45.29%   +0.46%     
==========================================
  Files         265      311      +46     
  Lines       14620    21885    +7265     
==========================================
+ Hits         6555     9913    +3358     
- Misses       7313    10915    +3602     
- Partials      752     1057     +305     

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[cristaloleg]

SGTM

[renaynay]

@walldiss can you also please add the warning to the flag description itself?

[Wondertan]

Linter 😭