[chore] add metadata status checks on the distribution

[atoulme]

Add a test checking that the status metadata of a component matches their presence in the otelcontribcol test suite.

[atoulme]

This fails because are detecting a number of components are not in the test suite when they should be.

[mx-psi]

Definitely. I'll add those and keep rebasing this PR over time to keep us closer to the tests passing.

Maybe it's easier to have an allowlist for components where we will ignore the test failures and merge the PR now? That way we avoid introducing errors on components that are currently passing

[atoulme]

It's really close, just need a tidy

[dmitryax]

Seems like it's still failing

[atoulme]

More components have metadata, so this test now detects more components missing from otelcontribcol:

--- FAIL: TestComponentsArePresent (0.73s)
    --- FAIL: TestComponentsArePresent/../../cmd/mdatagen/metadata.yaml (0.00s)
        distribution_metadata_test.go:60: 
            	Error Trace:	/home/runner/work/opentelemetry-collector-contrib/opentelemetry-collector-contrib/cmd/otelcontribcol/distribution_metadata_test.go:60
            	Error:      	Expected value not to be nil.
            	Test:       	TestComponentsArePresent/../../cmd/mdatagen/metadata.yaml
            	Messages:   	missing receiver: test
    --- FAIL: TestComponentsArePresent/../../extension/storage/dbstorage/metadata.yaml (0.00s)
        distribution_metadata_test.go:[56](https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/5095304215/jobs/9160133239?pr=21275#step:8:57): 
            	Error Trace:	/home/runner/work/opentelemetry-collector-contrib/opentelemetry-collector-contrib/cmd/otelcontribcol/distribution_metadata_test.go:56
            	Error:      	Expected value not to be nil.
            	Test:       	TestComponentsArePresent/../../extension/storage/dbstorage/metadata.yaml
            	Messages:   	missing extension: db_storage
    --- FAIL: TestComponentsArePresent/../../receiver/statsdreceiver/metadata.yaml (0.00s)
        distribution_metadata_test.go:[60](https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/5095304215/jobs/9160133239?pr=21275#step:8:61): 
            	Error Trace:	/home/runner/work/opentelemetry-collector-contrib/opentelemetry-collector-contrib/cmd/otelcontribcol/distribution_metadata_test.go:60
            	Error:      	Expected value not to be nil.
            	Test:       	TestComponentsArePresent/../../receiver/statsdreceiver/metadata.yaml
            	Messages:   	missing receiver: statsdreceiver

I'll add them.

[codeboten]

Some conflicts to resolve