ci: use non-caching Go workflow; remove legacy caching workflows to avoid go.sum requirement

Author: saadhtiwana

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.22.x'
+          cache: false
+
+      - name: Verify Go environment
+        run: |
+          go version
+          go env
+
+      - name: Build
+        run: go build ./...
+
+      - name: Test
+        run: go test -v ./...