[pkg/stanza] Stanza operators should not split batches of entries

[andrzej-stencel]

Component(s)

pkg/stanza

Is your feature request related to a problem? Please describe.

With the introduction of batching in File consumer in #35455, Stanza operators can now receive a batch of entries for processing, instead of single entries. Currently, the default implementation of the ProcessBatch method of every operator is to run Process on every entry in the batch, effectively splitting the batch into single entries. This has a negative impact on performance.

Describe the solution you'd like

All Stanza operators that can be configured in File Log receiver operators configuration should be able to process batches of entries without splitting the batches (unless that's strictly necessary for the operator's funcitonality).

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• pkg/stanza: @djaglowski

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[djaglowski]

Should we aim to remove Process methods? (see #39316)

[andrzej-stencel]

Should we aim to remove Process methods? (see #39316)

Yes, I think so, after a deprecation period (as it is a breaking change in the API).

[github-actions]

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Pinging code owners:

• pkg/stanza: @andrzej-stencel

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