Fix GitHub OAuth Spec

What does this MR do?

• Fixes GitHub OAuth spec by ensuring we have a fresh and valid OTP.
• Updates OP executables to the latest version
• Makes the OnePassword::CLI class a singleton an cache the session_token

Closes #36305 (closed)

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content