Make env get and delete work for env and env prop

[feedmeapples]

What was changed

Changed env syntax to as following

Read env key

temporal env get local.namespace
  namespace  canary

Read env

temporal env get local
  address    127.0.0.1:7233  
  namespace  canary

Set env key

temporal env set local.namespace default
Set 'local.namespace' to: default

Delete env key

temporal env delete canary.namespace
Deleted env property: canary.namespace

Delete env entry

temporal env delete canary
Deleted env: canary

Why?

UX design decision

Checklist

1. Closes

2. How was this tested:

Updated unit tests and ran locally. There seems to be another unrelated issue when running in a GHA pipeline

3. Any docs updates needed?

[bergundy]

Didn’t look closely at the implementation

[feedmeapples]

verified the unit tests pass