[processor/spanmetrics] Deprecate component

[djaglowski]

Component(s)

connector/spanmetrics, processor/spanmetrics

Describe the issue you're reporting

This is a tracking issue relating to open-telemetry/opentelemetry-collector#7370

The processor has been reimplemented as a connector. (See #18760)

We should deprecate the processor when the code owners believe the time is appropriate.

[github-actions]

Pinging code owners for connector/spanmetrics: @albertteoh @kovrus. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners for processor/spanmetrics: @albertteoh. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners:

• processor/spanmetrics: @albertteoh
• connector/spanmetrics: @albertteoh @kovrus

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• processor/spanmetrics: @albertteoh
• connector/spanmetrics: @albertteoh @kovrus

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[kovrus]

The processor was deprecated by #19751