set go's mod cache env var to a directory we can write to

Signed-off-by: Ryan Swanson <ryan.swanson@loft.sh>

Author: zerbitx

.github/workflows/e2e-tests.yaml

@@ -53,10 +53,12 @@ jobs:
  - name: Set up Go
  uses: actions/setup-go@v5
  with:
- go-version: "1.22"
-
+ go-version: "1.24"
+ 
  - name: Build devspacehelper
  run: |
+ export GOMODCACHE="${{ github.workspace }}/.gomodcache"
+ mkdir -p "$GOMODCACHE"
  mkdir -p ~/.devspace/devspacehelper/latest
  CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-extldflags=-static" -o ~/.devspace/devspacehelper/latest/devspacehelper helper/main.go
  chmod +x ~/.devspace/devspacehelper/latest/devspacehelper