Rename enduser and tab repos

[mrbobbytables]

The end user repos are being restructured to more closely mirror the TOC.

A summary of changes:

• cncf/tab -> cncf/tab-private - used for private discussions, meetings etc
• cncf/enduser-public -> cncf/tab - used for public facing issues, policies, discussions, meetings
• cncf/enduser -> cncf/enduser-private - end user members only items, discussions etc

[clowarden]

Validation failed

‼️ Some errors were found validating the configuration files

---

Errors:

• invalid directory configuration
  • error parsing permissions file
    • did not find expected key at line 797 column 6, while parsing a block mapping at line 792 column 5

---

For more details about the configuration files format please see the documentation.

🔺 These errors must be addressed before this PR can be merged 🔺

[clowarden]

Validation succeeded

✅ The proposed configuration changes are valid!

Configuration changes

Github

• repository enduser-private has been added (visibility: private)
  • Teams
    • cncf-end-users: write
    • cncf-projects: admin
    • cncf-tab: write
  • Collaborators
    • Swil78: admin
• repository tab-private has been added (visibility: private)
  • Teams
    • cncf-projects: admin
    • cncf-tab: write
  • Collaborators
    • Swil78: admin
• user Swil78 is now a collaborator (role: admin) of repository tab
• repository tab visibility has been updated to public

---

🔸 Please review the changes detected as they will be applied immediately once this PR is merged 🔸

[clowarden]

Reconciliation completed

‼️ Some errors were found during the reconciliation

Github

• Error applying change: CollaboratorAdded("glossary", "Giulia-dipietro", Write)

HTTP Error. Code: 403 Forbidden, message: {"message":"Resource not accessible by integration","documentation_url":"https://docs.github.com/rest/collaborators/collaborators#add-a-repository-collaborator","status":"403"}

[tegioz]

User Giulia-dipietro does no longer exist. This error should be fixed by merging #734.