Add tag category validation

[appilon]

Description

Perform runtime validation of tag category associable types (since validate funcs don't work on aggregate types)

Acceptance tests

• Have you added an acceptance test for the functionality being added?
• Have you run the acceptance tests on this branch?

Output from acceptance testing:

➜ make testacc TESTARGS='-run=TestAccResourceVSphereTagCategory_'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test $(go list ./... |grep -v 'vendor') -v -run=TestAccResourceVSphereTagCategory_ -timeout 240m
?   	github.com/hashicorp/terraform-provider-vsphere	[no test files]
=== RUN   TestAccResourceVSphereTagCategory_basic
--- PASS: TestAccResourceVSphereTagCategory_basic (27.80s)
=== RUN   TestAccResourceVSphereTagCategory_addType
--- PASS: TestAccResourceVSphereTagCategory_addType (38.78s)
=== RUN   TestAccResourceVSphereTagCategory_removeTypeShouldError
--- PASS: TestAccResourceVSphereTagCategory_removeTypeShouldError (29.45s)
=== RUN   TestAccResourceVSphereTagCategory_invalidTypeShouldError
--- PASS: TestAccResourceVSphereTagCategory_invalidTypeShouldError (14.07s)
=== RUN   TestAccResourceVSphereTagCategory_rename
--- PASS: TestAccResourceVSphereTagCategory_rename (35.05s)
=== RUN   TestAccResourceVSphereTagCategory_singleCardinality
--- PASS: TestAccResourceVSphereTagCategory_singleCardinality (21.97s)
=== RUN   TestAccResourceVSphereTagCategory_multiCardinality
--- PASS: TestAccResourceVSphereTagCategory_multiCardinality (24.10s)
PASS

Release Note

Release note for CHANGELOG:

`resource/tag_category`: Perform validation of associable types and update documentation around "All" which never worked.

References

Closes #1445

[tenthirtyam]

LGTM! 🚀

I added comments regarding including constants for each type (but it's not a requirement) and future methods to consider that could mask the API (e.g. com.vmware.content.library.Item) from the user with simpler terms.

[github-actions]

This functionality has been released in v2.1.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.