chore: fix receivers & check ResourceRender implements.

[qicz]

xref: #4263 (comment)

[codecov]

Codecov Report

Attention: Patch coverage is 18.18182% with 9 lines in your changes missing coverage. Please review.

Project coverage is 66.00%. Comparing base (b91f296) to head (a246c29).

Files with missing lines	Patch %	Lines
internal/ir/xds.go	28.57%	5 Missing ⚠️
internal/ir/infra.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4344      +/-   ##
==========================================
- Coverage   66.04%   66.00%   -0.05%     
==========================================
  Files         200      200              
  Lines       24052    24052              
==========================================
- Hits        15886    15875      -11     
- Misses       7036     7044       +8     
- Partials     1130     1133       +3     

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[qicz]

/retest