Remove v prefix from the container image version/tag

[pavolloffay]

Signed-off-by: Pavol Loffay [email protected]

All other OTEL images are published as X.Y.Z (without v prefix).

The operator image is already published without prefix - https://github.com/open-telemetry/opentelemetry-operator/pkgs/container/opentelemetry-operator%2Fopentelemetry-operator

@jpkrohling is there any reason why the operator image has v prefix?

[jpkrohling]

No. Can we publish both versions, so that people won't get a bad surprise when they try to upgrade by just bumping the version? Adding an entry to the changelog and removing this support in a couple of versions should be fine.

[pavolloffay]

Support for publishing raw tag and semantic is already there.