[otel-collector] Add option to remove config checksum annotation

[chenlujjj]

Now the otel-collector pod has checksum/config annotation by default which can trigger pod redeploy when config changes. It makes sense for most user scenarios.

In our use case, we'd like remove this annotation, because we want to put a sidecar in the otel-collector pod, which watches the config file change and sends SIGHUP to otel-collector process to reload config.

[chenlujjj]

If this is reasonable, I'll create a PR.

[TylerHelmuth]

An option to disable it is fine.