karunpoudel

resolves #4919 ### Description ### Checklist - [x] I have read [the contributing guide](https://github.com/dbt-labs/dbt-core/blob/main/CONTRIBUTING.md) and understand what's expected of me - [x] I have signed the [CLA](https://docs.getdbt.com/docs/contributor-license-agreements) - [x] I...

Just a best practice. It allows to execute code when the file runs as a script, but not when it’s imported as a module (eg. call from another python script)...

The webserver specific labels are missing from webserver deployment labels. Other objects like webserver service, hpa etc includes this label but not just deployment. Similar situation in scheduler side also....