* check the da cache and the attester cache in responding to RPC requests
* use the processing cache instead
* update comment
* add da cache metrics
* rename early attester cache method
* Merge branch 'unstable' of https://github.com/sigp/lighthouse into check-da-cache-in-rpc-response
* make rustup update run on the runners
* Revert "make rustup update run on the runners"
This reverts commit d097e9bfa84a13b1d7813c03df38e7756fb0bfc5.