Enable CI job token authorizations log

What does this MR do and why?

• Related to [Feature flag] Rollout of `ci_job_token_authori... (#478869 - closed)
• Related to Track authentications via job token and show lo... (#467292 - closed)

In this MR we are removing the feature flag ci_job_token_authorizations_log that was rolled out in [Feature flag] Rollout of `ci_job_token_authori... (#478869 - closed). FF has been enabled in production since September 23rd.

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