ci: selectively revert this runner (#3297)

This workflow is failing. We will revisit once the default username
includes the docker group.

Signed-off-by: Ramkumar Chinchani <rchincha.dev@gmail.com>

.github/workflows/ecosystem-tools.yaml

@@ -14,7 +14,7 @@ permissions: read-all
 jobs:
   client-tools:
     name: Check client tools
-    runs-on: oracle-vm-16cpu-64gb-x86-64
+    runs-on: ubuntu-latest-16-cores
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5