config: support v0.3 of the config schema

[codeboten]

Leaving this in draft until v0.3 is released.

[codecov]

Codecov Report

Attention: Patch coverage is 49.20635% with 64 lines in your changes missing coverage. Please review.

Project coverage is 65.4%. Comparing base (a6c3927) to head (8486766).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
config/generated_config.go	0.0%	58 Missing ⚠️
config/metric.go	86.6%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #6126     +/-   ##
=======================================
- Coverage   65.7%   65.4%   -0.3%     
=======================================
  Files        204     204             
  Lines      13088   13165     +77     
=======================================
+ Hits        8608    8621     +13     
- Misses      4216    4277     +61     
- Partials     264     267      +3     

Files with missing lines	Coverage Δ
config/config.go	84.0% <100.0%> (+1.7%)	⬆️
config/log.go	94.2% <100.0%> (ø)
config/resource.go	100.0% <100.0%> (ø)
config/trace.go	96.4% <100.0%> (ø)
config/metric.go	89.8% <86.6%> (-1.8%)	⬇️
config/generated_config.go	0.0% <0.0%> (ø)

[codeboten]

More go proxy sadness :(

Error: detector.go:14:2: k8s.io/[email protected]: Get "https://proxy.golang.org/k8s.io/client-go/@v/v0.31.1.zip": stream error: stream ID 5; PROTOCOL_ERROR
Error: detector.go:15:2: k8s.io/[email protected]: Get "https://proxy.golang.org/k8s.io/client-go/@v/v0.31.1.zip": stream error: stream ID 5; PROTOCOL_ERROR