generate: Add hyperlinks to user documentation and version callouts for write-only attribute documentation

[SBGoods]

Closes: #447
Closes: #448

• Adds a hyperlink to write-only user documentation in the Write-only attribute label:

- `write_only_string_attribute` (String, [Write-only](https://developer.hashicorp.com/terraform/language/resources/ephemeral#write-only-arguments)) example write-only string attribute

• Adds a version callout to every group section containing a write-only attribute:

### Required

> **NOTE**: [Write-only arguments](https://developer.hashicorp.com/terraform/language/resources/ephemeral#write-only-arguments) are supported in Terraform 1.11 and later.

- `required_write_only_string_attribute` (String, [Write-only](https://developer.hashicorp.com/terraform/language/resources/ephemeral#write-only-arguments)) example required write-only string attribute

[austinvalle]

LGTM 👍🏻