Use host module cache without build cache

[scaiper]

What version of gazelle are you using?

0.35.0

What version of rules_go are you using?

0.45.1

What version of Bazel are you using?

7.0.2

Description

We would like to have somewhat persistent Go module cache on our CI workers. We've looked at GO_REPOSITORY_USE_HOST_CACHE but it overrides GOPATH and GOCACHE also, while we only need to change GOMODCACHE. Secondly, go mod download do not verify a module in case of a case hit, which is not ideal.