32669 sumconnector config

[greatestusername]

Description: Fleshes out the config more fully and provides tests for the config and possible combinations of settings

Link to tracking Issue: #32669

Testing: Added test cases and testing for config

Documentation: No new documentation yet.

[greatestusername]

Regarding tests and the size of PRs:

Is it cool to do tests in a separate PR from functionality?
Realizing that the tests for this small bit were like 500 lines and I'm sure you don't want to look at things much larger than that in an entire PR if possible 😛

Edit to add: Is changelog required here if the component isn't live or wired in yet?

[crobert-1]

Regarding tests and the size of PRs:

This is fine for me since it's mostly test code. My preference is to keep functionality changes and the relevant tests in the same PR as much as possible. I'll review.

As far as changelog, it's really just what's relevant to users. Announcing that a new component is being adding makes sense (the last PR), adding config validation not as much. I don't think a changelog is required here, but you're welcome to add one if you'd like.

[crobert-1]

From failing CI actions:

Generated code is out of date, please run "make generate" and commit the changes in this PR.

sumconnector/config_test.go:510: File is not `gci`-ed with --skip-generated -s standard -s default -s prefix(github.com/open-telemetry/opentelemetry-collector-contrib) (gci)
			expect: `spans: metric name missing`+"\n"+`spans: metric source_attribute missing`+"\n"+`spans condition: metric "": unable to parse OTTL condition "invalid condition": condition has invalid syntax: 1:9: unexpected token "condition" (expected <opcomparison> Value)`+"\n"+`spans attributes: metric "": attribute key missing`,
sumconnector/config_test.go:525: File is not `gci`-ed with --skip-generated -s standard -s default -s prefix(github.com/open-telemetry/opentelemetry-collector-contrib) (gci)
			expect: `spanevents: metric name missing`+"\n"+`spanevents: metric source_attribute missing`+"\n"+`spanevents condition: metric "": unable to parse OTTL condition "invalid condition": condition has invalid syntax: 1:9: unexpected token "condition" (expected <opcomparison> Value)`+"\n"+`spanevents attributes: metric "": attribute key missing`,
sumconnector/config_test.go:540: File is not `gci`-ed with --skip-generated -s standard -s default -s prefix(github.com/open-telemetry/opentelemetry-collector-contrib) (gci)
			expect: `metrics: metric name missing`+"\n"+`metrics: metric source_attribute missing`+"\n"+`metrics condition: metric "": unable to parse OTTL condition "invalid condition": condition has invalid syntax: 1:9: unexpected token "condition" (expected <opcomparison> Value)`+"\n"+`metrics attributes not supported: metric ""`,

[crobert-1]

Test failures are frequencies of #33998, added reference there.