fix: update api spec, add admin api spec, add release action to publish versioned spec

[itslenny]

What kind of change does this PR introduce?

docs update

listed as fix so a semantic version bump will occur so we can test the updated release github action (and fix if needed)

What is the current behavior?

Many missing storage api endpoints. No storage admin api spec.

What is the new behavior?

• Add missing tags for storage api spec
• Change purge cache to cdn tag / operation
  • renamed to 'purge_object_cache' in anticipation of upcoming 'purge_bucket_cache', 'purge_tenant_cache', 'purge_transformation_cache'
• Add admin api spec and swagger ui
• Update github action to generate api specs with version specified on release and attach to the release

Adding tags to admin apis resulted in a lot of formatting changes so the PR looks a lot bigger than it is due to that