doc: Atlas: Support TLS 1.3 (DOCSP-54400)

[xargom]

Description

Replaces all mentions of TLS1_0 and 1_1 for 1_2 and 1_3

Link to any related issue(s): DOCSP-54400

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.

Further comments

[github-actions]

APIx bot: a message has been sent to Docs Slack channel

[jromo-mdb]

LGTM

[marcosuma]

LGTM - can you sync with @marcabreracast as she's working on the PR to release support for TLS1.3 on Terraform - we should release both PRs more or less at the same time

[github-actions]

This PR has gone 7 days without any activity and meets the project’s definition of "stale". This will be auto-closed if there is no new activity over the next 7 days. If the issue is still relevant and active, you can simply comment with a "bump" to keep it open, or add the label "not_stale". Thanks for keeping our repository healthy!

[Copilot]

Pull request overview

This PR updates the MongoDB Atlas Terraform provider documentation and API specifications to remove support for deprecated TLS versions 1.0 and 1.1, retaining only TLS 1.2 and 1.3 as valid options for cluster configurations.

Key Changes:

• Removed TLS1_0 and TLS1_1 from enum values in API specification files
• Updated test configurations to use TLS1_2 instead of TLS1_1
• Updated all documentation files to reflect the supported TLS versions (1.2 and 1.3 only)

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tools/codegen/atlasapispec/raw-multi-version-api-spec.yml	Removed TLS1_0 and TLS1_1 from minimumEnabledTlsProtocol enum definitions in three locations
tools/codegen/atlasapispec/multi-version-api-spec.flattened.yml	Removed TLS1_0 and TLS1_1 from minimumEnabledTlsProtocol enum definitions in flattened spec
internal/testutil/acc/advanced_cluster_mig_TPF_test.go	Updated test configurations from TLS1_1 to TLS1_2
docs/resources/cluster.md	Updated documentation to list only TLS1_2 and TLS1_3 as valid values
docs/resources/advanced_cluster.md	Updated documentation to list only TLS1_2 and TLS1_3 as valid values
docs/data-sources/clusters.md	Updated documentation to list only TLS1_2 and TLS1_3 as valid values
docs/data-sources/cluster.md	Updated documentation to list only TLS1_2 and TLS1_3 as valid values
docs/data-sources/advanced_clusters.md	Updated documentation to list only TLS1_2 and TLS1_3 as valid values
docs/data-sources/advanced_cluster.md	Updated documentation to list only TLS1_2 and TLS1_3 as valid values

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[marcabreracast]

Did a merge from master to make sure that PR #3912 does not cause any issues.
FYI @xargom, merging this PR now so both PRs are merged at the same time. Thank you! Feel free to resolve the associated DOCSP ticket.