Prepare LogPipeline reconciler for OTLP output

[a-thaler]

Description
Relates to #556

1. Have a dummy otlp output which is available on the development release only

• adjust "make manifest" target to remove otlp output definition for regular release
• no detailed sub-structure needed for now
• when activated, have a dummy log to indicate activation

2. If the otlp output is selected in a pipeline, fluentbit gets not deployed/cleaned up (mixed case still possible), but also no otel-collector for now

• Have the main switch in place, deciding on otel-collector deployments (otlp) or fluentbit (http, custom)
• It should be clear where to put follow-up code

Reasons

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Release Notes