add new output OTLP Logs + improve the OTLP Traces/Metrics

[Issif]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area build

/area config

/area outputs

/area tests

What this PR does / why we need it:

• Add new output OTLP Logs
• Cleanup of client creations for OTLP Metrics/Traces
• Rename the files for OTLP outputs for consistency
• Add the Falco Output as span.Event in Traces
• Add an ErrorHandler to format the OTEL SDK Errors with same pattern than all outputs
• Update the docs for the OTLP ouputs

Which issue(s) this PR fixes:

Fixes #

#1084

Special notes for your reviewer:

[poiana]

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