Nightly metadata synchronizer Github action

[jaydeluca]

Related to #13468

Resolves #14334

Github action that runs nightly that will:

• Generate all the .telemetry files using a new collect script customized for CI (no colima)
• Run the DocGenerator to analyze all the modules and telemetry and generate an updated instrumentation-list.yaml file
• If there are changes to the file, automatically generate a PR to update the file

I tested a slimmed down version of this (not using otelbot) and it worked as expected:
https://github.com/jaydeluca/opentelemetry-java-instrumentation/pull/8/files

[trask]

let's give it a spin!