feat: Add error_message, provider_account_id, and interface_endpoint_name to Stream PrivateLinkEndpoint models

[tcannon91]

Description

Add fields that exist in the Atlas Admin API for Streams PrivateLink Endpoints (error_message, provider_account_id, interface_endpoint_name). Also improve validation around the vendor and provider_name fields to fail faster (during planning) rather than waiting until getting a response from the API that is inconsistent with potential passed in values.

Link to any related issue(s):
https://jira.mongodb.org/browse/CLOUDP-301851

Type of change:

• Bug fix (non-breaking change which fixes an issue). Please, add the "bug" label to the PR.
• New feature (non-breaking change which adds functionality). Please, add the "enhancement" label to the PR. A migration guide must be created or updated if the new feature will go in a major version.
• Breaking change (fix or feature that would cause existing functionality to not work as expected). Please, add the "breaking change" label to the PR. A migration guide must be created or updated.
• This change requires a documentation update
• Documentation fix/enhancement

Required Checklist:

• I have signed the MongoDB CLA
• I have read the contributing guides
• I have checked that this change does not generate any credentials and that they are NOT accidentally logged anywhere.
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code
• If changes include deprecations or removals I have added appropriate changelog entries.
• If changes include removal or addition of 3rd party GitHub actions, I updated our internal document. Reach out to the APIx Integration slack channel to get access to the internal document.

[marcosuma]

LGTM - good to have another pair of eyes cc @oarbusi

[marcosuma]

@tcannon91 today we'll release 1.29 (ref). This change won't go in there but we're planning to release next week as well. For reference, this is the changelog file to see what it'll be released next

[tcannon91]

Created this PR within the mongodb repo rather than my fork: #3161

[tcannon91]

Closing in favor of: #3161