Add modulequeries file cache for module version queries

This adds a new file cache named 'modulequeries' with a 24h maxAge
that caches JSON responses from 'go mod download -json' when querying
module versions with constraints (e.g., version = "<v3.0.0").

On subsequent builds, if the cached JSON exists and the module
directory it references is non-empty, the cached result is used
directly, skipping the costly VCS interaction entirely.

Fixes #14417

.github/workflows/test.yml

@@ -122,7 +122,6 @@ jobs:
         name: Test
         run: |
           mage -v test
-          go clean -i -testcache
         env:
           HUGO_BUILD_TAGS: extended,withdeploy
       - if: matrix.os == 'ubuntu-latest'