Bad error message for 'rad bicep publish' without tag

[rynowak]

Bug information

Steps to reproduce (required)

Run the following:

rad bicep publish --file test/functional/corerp/resources/testdata/recipes/test-recipes/dapr-state-store.bicep --target br:rynowak.azurecr.io/test/functional/corerp/recipes/dapr-state-store

You can substitute any file, and any destination, but leave off the tag.

Observed behavior (required)

The error output:

Building test/functional/corerp/resources/testdata/recipes/test-recipes/dapr-state-store.bicep...
Error: invalid target "rynowak.azurecr.io/test/functional/corerp/recipes/dapr-state-store"

This error message isn't very helpful. It should explain the format, or what's wrong.

Desired behavior (required)

rad bicep publish targets the lack of a tag and infers latest

OR

The error message is improved.

Workaround (optional)

Specify the latest tag explicitly.

AB#7967

AB#9501

[rynowak]

/cc @ytimocin

[ytimocin]

This shouldn't be a blocker for this release, right? Can it be handled in the upcoming sprint and go with the next release? cc/ @rynowak @AaronCrawfis

[rynowak]

Not a blocker, just minor polish.