k8s_resource.objects param doesn't let you distinguish btwn two identical k8s entities

Reproduce the issue with the Tiltfile and k8s_resource.objects example from the report. Start by tracing how the objects selector handles the documented name:kind:namespace form and the unique-fragment error. Done means identical Kubernetes entities can be distinguished or selected as requested, with a useful error when selection remains ambiguous.

Expected Behavior

k8s_resource.objects param should let you specify any k8s entity that Tilt knows about

Current Behavior

In the case where Tilt has two of the same k8s entities, Tilt names them by appending an index to the end, like so:

• foobar:pod:my-ns:apiextensions.k8s.io:0
• foobar:pod:my-ns:apiextensions.k8s.io:1

There is no way to disambiguate them via k8s_resource.objects (since that param. only accepts selectors of the form name:kind:namespace--otherwise you get the error "Too many parts in selector. Selectors must contain between 1 and 3 parts (colon separated)"). If you pass foobar:pod:my-ns, you get:

"foobar:pod:my-ns" is not a unique fragment. Objects that match "foobar:pod:my-ns" are "foobar:pod:my-ns", "foobar:pod:my-ns"

1. The error message is unhelpful, but more importantly
2. you will never be able to use k8s_resource.objects to specify either/both of these entities, b/c the objects param REQUIRES you to uniquely specify an entity, and tilt gives you no way to do this if the entities are identical. This param should probably let you specify entities non-uniquely (see #3727) -- tho at minimum, if it requires you to specify entities uniquely, you should be able to in this case.

Steps to Reproduce

1. Tiltfile:

   load('ext://helm_remote', 'helm_remote')
   
   REPO_URL = 'https://containous.github.io/traefik-helm-chart'
   OBJ = 'tlsoptions.traefik.containo.us:CustomResourceDefinition:default'
   helm_remote('traefik', repo_name='traefik',
               repo_url=REPO_URL,
               namespace='default', version='8.9.0')
   k8s_resource('traefik', port_forwards='8000',
           objects=[OBJ]
   )
   

2. tilt up
3. See error (snapshot):

   "tlsoptions.traefik.containo.us:CustomResourceDefinition:default" is not a unique fragment. Objects that match "tlsoptions.traefik.containo.us:CustomResourceDefinition:default" are "tlsoptions.traefik.containo.us:CustomResourceDefinition:default", "tlsoptions.traefik.containo.us:CustomResourceDefinition:default"

About Your Use Case

Reported by Isaac Wilder in Slack. Minor issue/not blocking.