github: add testrace back to PR checks

It won't block merging but it will run again on all PRs.

Author: RaduBerinde

.github/workflows/ci.yaml

@@ -1,4 +1,4 @@
-name: Test
+name: PR tests
 
 on:
   push:
@@ -63,6 +63,19 @@ jobs:
 
       - run: GOTRACEBACK=all make test TAGS=
 
+  linux-race:
+    name: linux-race
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "1.23"
+
+      - run: GOTRACEBACK=all make testrace TAGS=
+
   darwin:
     name: go-macos
     runs-on: macos-14