[recievers/filelog] - key_value_parser not registered

[crobertson-conga]

Describe the bug
The key value parser from stanza was merged in response to open-telemetry/opentelemetry-log-collection#455

However, it was never registered, so cannot be used as an operator in the filelog parser receiver.

Steps to reproduce
Have a operator step in a filelog receiver that uses type key_value_parser

in your filelog reciever

What did you expect to see?
key=value logs being parsed

What did you see instead?
An error upon startup:

Error: cannot build pipelines: failed to create "filelog" receiver, in pipeline "logs": unsupported type 'key_value_parser

What version did you use?
Version: 0.58.0

What config did you use?

config:
  receivers:
    filelog:
      include:
        - /var/log/pods/*/*/*.log
      exclude: []
      operators:
        - type: key_value_parser
          id: general-body-logfmt
          output: severity-parser-0
          parse_from: body

Environment
Doesn't matter

Additional context
Should be a matter of adding a new registration at

opentelemetry-collector-contrib/pkg/stanza/adapter/register.go

Line 21 in 7e14323

_ "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/operator/parser/csv"

and updating the documentation accordingly

[rehanpfmr]

@crobertson-conga Can this be assigned to me?

[evan-bradley]

@rehanpfmr It's yours.

[github-actions]

Pinging code owners: @djaglowski. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[rehanpfmr]

Thanks @evan-bradley

[djaglowski]

Resolved by #14094

[jangaraj]

@djaglowski I don't see syslog parser in current register.go. Is it possible that is a root cause of unsupported type 'syslog_parser' error, when ocb is used?
Ref: https://stackoverflow.com/questions/77026536/custom-build-of-opentelemetry-collector-is-missing-operator-used-by-receiver

[djaglowski]

@jangaraj, yes I agree. Thanks for the PR.