infra: remove duplicate lint and run tests (#67)

I noticed in `pr-validation` we are running our linter twice, and not
running unit-tests at all.

.github/workflows/pr-validation.yml

@@ -6,20 +6,6 @@ on:
       - master
 
 jobs:
-  lint:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
-
-      - uses: actions/setup-go@v4
-        with:
-          go-version: '^1.20'
-
-      - name: Go Linter
-        run: docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:v1.52.0 golangci-lint run -v -E gofmt --timeout=5m
-
   test:
     strategy:
       matrix:
@@ -38,6 +24,9 @@ jobs:
       - name: Go Linter
         run: docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:v1.52.0 golangci-lint run -v -E gofmt --timeout=5m
 
+      - name: Go Test
+        run: go test -v ./...
+
   build:
     runs-on: ubuntu-latest
     steps: