e2e: Add test for libgit2 tag semver range

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/e2e.yaml

@@ -80,6 +80,13 @@ jobs:
             --tag-semver=">=3.2.3" \
             --export | kubectl apply -f -
           /tmp/flux delete source git podinfo-export --silent
+      - name: flux create source git libgit2 semver
+        run: |
+          /tmp/flux create source git podinfo-libgit2 \
+            --url https://github.com/stefanprodan/podinfo  \
+            --tag-semver=">=3.2.3" \
+            --git-implementation=libgit2
+          /tmp/flux delete source git podinfo-libgit2 --silent
       - name: flux get sources git
         run: |
           /tmp/flux get sources git