Enhancement: Allow users to provide arbitrary pod annotations to allow users to mesh NGF with meshes like LinkerD

[estenrye]

I noticed while trying to mesh NGF into LinkerD's service mesh that the helm chart does not provide any means for me to inject the annotations required to mesh the NGF pods.

I propose adding an optional nginxGateway.podAnnotations value that would allow the user to provide these annotations.

It could look something like this:
https://github.com/estenrye/nginx-gateway-fabric/pull/1/files

[kate-osborn]

Thanks for the idea @estenrye. We will discuss this in our community meeting on Monday. Feel free to join if you like! Details here: https://github.com/nginxinc/nginx-gateway-fabric?tab=readme-ov-file#community-meetings

[mpstefan]

Discussed this today and we completely agree. Opened an issue for this, and if you could take a look, that would be great!