[receiver/filelog] Document includes/excludes

[atoulme]

Component(s)

receiver/filelog

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

filelogreceiver has both an includes an excludes parameter. We should document how these interact.

Describe the solution you'd like

Take the logic defined in

opentelemetry-collector-contrib/pkg/stanza/fileconsumer/matcher/internal/finder/finder.go

Line 24 in cca42e0

func FindFiles(includes []string, excludes []string) ([]string, error) {

and the tests defined in https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/stanza/fileconsumer/matcher/internal/finder/finder_test.go#L57 and use them as basis for additional documentation of the receiver or stanza config to make it possible for end users to create the right filters.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• receiver/filelog: @djaglowski

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