remote-cache config missing from 0.26.0+ bazelrc

As title describes, there used to be `build:remote-cache`, but there are no longer these config in bazelrc for version beyond 0.25.0

Start by comparing the bazelrc configuration for version 0.25.0 with versions 0.26.0 and later, focusing on the missing build:remote-cache setting. Trace where the versioned toolchain configuration is defined and confirm the expected configuration for remote caching. Done means the appropriate remote-cache config is present for versions beyond 0.25.0 and the relevant configuration remains consistent.

Written by the indexing model from the issue text.