The videos were breaking the layout of the documentation pages
and making it difficult to click on the right menu items.
Also tackled the Japanese translated pages.
* Extract a generic OpenTelemetry Collector page
* Also move Azure Monitor metrics page to Metrics section.
* Rename to open-telemetry-collector-appinsights.yaml
* Update PR from msfussell@ feedback
* Update PR per msfussell@ feedback
* Move # into <ref>
* Change References to Related Links & update description
* Update image to use standard asset