[chore] add SAPM deprecation metadata

[atoulme]

Description

See open-telemetry/opentelemetry-collector#12359

Add more deprecation metadata to the sapm components.

[ChrsMark]

Shall we ignore the metadata validation failure for now?

Error: failed loading /home/runner/work/opentelemetry-collector-contrib/opentelemetry-collector-contrib/receiver/sapmreceiver/metadata.yaml: decoding failed due to the following error(s):

'status' has invalid keys: deprecation
Error: failed loading /home/runner/work/opentelemetry-collector-contrib/opentelemetry-collector-contrib/receiver/sapmreceiver/metadata.yaml: decoding failed due to the following error(s):

https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/13507291093/job/37739730675?pr=38144#step:16:111

[atoulme]

I was hoping the yaml deserializer would be ok with additional fields. Now we have to synchronize all the PRs.

I will make a change to mdatagen to ignore additional fields, then we can update mdatagen, then we can roll this up.

[atoulme]

open-telemetry/opentelemetry-collector#12484 is open to attend to this.

[dmitryax]

Why do we want add new fields that are not being used?

[atoulme]

open-telemetry/opentelemetry-collector#12359

You can see the issue here: open-telemetry/opentelemetry-collector#12464
We want to add a new field to components in contrib, then add support for it.

[dmitryax]

Makes sense. Why don't implement it first instead of open-telemetry/opentelemetry-collector#12484?

[ChrsMark]

mdatagen checks succeed now. LGTM