fix(ci): drop go work sync, use workspace root for go test

go work sync tries to resolve local modules from the module proxy,
which fails for core@v0.0.0 since the module is not yet published.
It is not needed here: running go test/vet from the workspace root
is enough — Go finds go.work, resolves local modules via use directives,
downloads external deps from the proxy, and verifies checksums via
go.work.sum. Also removes -mod=mod which is not allowed in workspace mode.

Author: EmanueleMinotto

.github/workflows/ci.yml

@@ -18,19 +18,15 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
-      # Download all workspace dependencies in one pass.
-      # -mod=mod allows Go to update go.sum files as needed.
-      - name: Download dependencies
-        run: go work sync
       - name: Test all modules (unit)
-        run: go test -mod=mod ./...
+        run: go test ./...
       - name: Test core (integration)
-        run: go test -mod=mod -tags integration ./core/...
+        run: go test -tags integration ./core/...
         env:
           GOOGLE_CREDS_B64: ${{ secrets.GOOGLE_CREDS_B64 }}
           SKIPPER_SPREADSHEET_ID: ${{ secrets.SKIPPER_SPREADSHEET_ID }}
       - name: Test framework modules with live spreadsheet
-        run: go test -mod=mod ./testing/... ./testify/... ./ginkgo/...
+        run: go test ./testing/... ./testify/... ./ginkgo/...
         env:
           GOOGLE_CREDS_B64: ${{ secrets.GOOGLE_CREDS_B64 }}
           SKIPPER_SPREADSHEET_ID: ${{ secrets.SKIPPER_SPREADSHEET_ID }}
@@ -43,7 +39,5 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.23'
-      - name: Download dependencies
-        run: go work sync
       - name: Vet all modules
-        run: go vet -mod=mod ./...
+        run: go vet ./...

.github/workflows/sync.yml

@@ -13,10 +13,8 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: '1.23'
-      - name: Download dependencies
-        run: go work sync
       - name: Sync spreadsheet
-        run: go test -mod=mod -tags integration ./core/...
+        run: go test -tags integration ./core/...
         env:
           SKIPPER_MODE: sync
           GOOGLE_CREDS_B64: ${{ secrets.GOOGLE_CREDS_B64 }}

Makefile

@@ -17,7 +17,6 @@ lint:
 	go vet ./...
 
 tidy:
-	go work sync
 	@for m in $(MODULES); do \
 	  echo "==> Tidying $$m"; \
 	  (cd $$m && go mod tidy); \