MM-68258 Remove docs for secure_connection_manager role

[wiggin77]

Summary

Removes docs for secure_connection_manager role. This role was added recently, never shipped, and it was decided we do not need it.

Ticket Link

https://mattermost.atlassian.net/browse/MM-68258

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 1fb1cde1-3fed-4900-8306-ad494ce12f76

📥 Commits

Reviewing files that changed from the base of the PR and between 73e24f9 and 88a4709.

📒 Files selected for processing (3)

• source/administration-guide/onboard/advanced-permissions-backend-infrastructure.rst
• source/administration-guide/onboard/connected-workspaces.rst
• source/administration-guide/onboard/delegated-granular-administration.rst

💤 Files with no reviewable changes (1)

• source/administration-guide/onboard/advanced-permissions-backend-infrastructure.rst

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📝 Walkthrough

Walkthrough

This pull request removes the system_secure_connection_manager role and its associated manage_secure_connections permission from documentation. It restricts connected workspace operations and secure connection management to system administrators only, removing prior delegation capabilities to users with the Secure Connection Manager role.

Changes

Cohort / File(s)	Summary
Built-in role removal source/administration-guide/onboard/advanced-permissions-backend-infrastructure.rst	Removes the system_secure_connection_manager role definition and its default manage_secure_connections permission entry from the "Built-in roles" section.
Connected workspace authorization updates source/administration-guide/onboard/connected-workspaces.rst	Restricts secure connection creation from "system admins or Secure Connection Manager role users" to "system admins" only. Removes Secure Connection Manager delegation references from Slash Commands and the "Manage connections and invitations" section, limiting delegation to Shared Channel Manager.
Delegated administration configuration source/administration-guide/onboard/delegated-granular-administration.rst	Removes Secure Connection Manager from the "Available roles" list and deletes corresponding default permissions table entries. Removes role assignment instructions and mmctl command examples. Updates the "Edit privileges of admin roles" section to exclude only Custom Group Manager and Shared Channel Manager from system admin grant restrictions.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Doc changes for MM-67647 that adds two new roles to manage secure connections #8752: Main PR that adds the system_secure_connection_manager role and its associated permission—this PR performs the inverse operation by removing the same role definitions and documentation references.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: removing documentation for the secure_connection_manager role.
Description check	✅ Passed	The description is directly related to the changeset, explaining why the documentation is being removed (role was added recently, never shipped, and is no longer needed).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch MM-68258_remove_role_secure_connetion_manager

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[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA 88a4709