Tracking issues of ghac service upgrade

[Xuanwo]

In response to #5620, we are tracking our upgrade process here and keeping all relevant downstream users informed.

Timeline

The actions/cache backend service has been rewritten from the ground up for improved performance and reliability. The new service has been gradually rolling out since February 1st, 2025. The legacy service will be sunset by March 1st.

Tasks

• Implement the new ghac services based on Time sensitive: GitHub Actions cache service integration #5620
• Cut of a new releases of that
• Notify downstream users and help them to perform the migrate.
  • Sccache Time sensitive: GitHub Actions cache service integration mozilla/sccache#2330

[Xuanwo]

ghac v2 has been implemented in #5633