add policy opentelemetry/inject-otel-environment-variable

[babs]

Description

This PR allow injection of opentelemetry environment variables based on namespace and pod annotations.

Checklist

• I have read the policy contribution guidelines.
• I have added test manifests and resources covering both positive and negative tests that prove this policy works as intended.
• I have added the artifacthub-pkg.yml file and have verified it is complete and correct.

[KhaledEmaraDev]

Tested and it LGTM!

[eddycharly]

It doesn't require any code change ?

[babs]

For me it is stable as-is.
Some features could be added later on if needed.

[eddycharly]

I didn't notice it was a PR on the policies repo 🙈