[exporter/loki] Deprecate component

[jpkrohling]

Component(s)

exporter/loki

Describe the issue you're reporting

Loki is able to ingest OTLP natively for a few months now. As one of the code owners for this component, I feel that we are ready to deprecate this in favor of OTLP natively. This issue is a tracker for this deprecation, composed of:

• [exporter/loki] Change the component stability to deprecated #33917
• Remove the component from distributions by September 2024
• Remove the code for this component by October 2024

[github-actions]

Pinging code owners:

• exporter/loki: @gramidt @gouthamve @jpkrohling @mar4uk

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

[github-actions]

Pinging code owners for exporter/loki: @gramidt @gouthamve @jpkrohling @mar4uk. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[jameshulse]

Is it possible to document, or provide a sample configuration for the OTLP exporter that would simulate any of the transformation that the loki exporter was doing under the hood (if any).

[mar4uk]

Is it possible to document, or provide a sample configuration for the OTLP exporter that would simulate any of the transformation that the loki exporter was doing under the hood (if any).

@jameshulse the loki exporter README was just updated. Please find migration instructions and sample configuration there. Please let us know if something is not clear or missing