wasme deploy should support "latest" tag on image

[jameshbarton]

Is your feature request related to a problem?
I'm frustrated in wasm dev mode when I want to push/deploy iterations of wasm filters with the same version. When I'm in dev mode, I don't want to have to bump the version number on every iteration. However, if I don't do that, Gloo Edge continues to use its latest cached version of that filter with the same version number. Even when I undeploy/deploy the filter, it still uses the cached version rather than fetching the latest from the OCI repo.

Related to solo-io/gloo#4207

Describe the solution you'd like
I'd like support for the latest tag as in docker, quay, etc.

% wasme deploy gloo webassemblyhub.io/jameshbarton/bad-char-bug:latest --id=bad-char-bug
Error: All attempts fail:
#1: webassemblyhub.io/jameshbarton/bad-char-bug:latest: not found

Describe alternatives you've considered
Creating new versions for every iteration is a clunky workaround.