* Incorporate compressedEndpoint property into extension charts - refactor publishing script to use values.yaml for endpoints
* Include compressed extension in ECI build plugin contents
This change enhances the extension-server.labels directive in _helpers.tpl
to avoid error when setting the app.kubernetes.io/version label with version
which includes + character. This is valid for semver but not for label version.
The solution adopts the convention used in Helm which replaces + with _ when
storing the version in places which don't allow + usage, e.g. OCI repository.
The same approach is already used in the `extension-server.chart` directive,
which is also used as a label value.
Fixes Issue 13584
Jordon Leach
Jiri Tomasek
Neil MacDougall
Alexandre Alves
Jordon Leach