ci: run cilium tests concurrently

[ upstream commit 4ca1b62 ]

The commit adds the `test-concurrency` parameter to speed up Cilium
connectivity tests.

Signed-off-by: viktor-kurchenko <viktor.kurchenko@isovalent.com>

Author: viktor-kurchenko

.github/workflows/cilium-integration-tests.yaml

@@ -163,7 +163,14 @@ jobs:
 
     - name: Execute Cilium L7 Connectivity Tests
       shell: bash
-      run: cilium connectivity test --test="l7|sni|tls|ingress|check-log-errors" --curl-parallel=${{ env.CURL_PARALLEL }} --collect-sysdump-on-failure --flush-ct --sysdump-hubble-flows-count=100000 --sysdump-hubble-flows-timeout=15s
+      run: |
+          cilium connectivity test \
+          --test="l7|sni|tls|ingress|check-log-errors" \
+          --curl-parallel=${{ env.CURL_PARALLEL }} \
+          --collect-sysdump-on-failure --flush-ct \
+          --sysdump-hubble-flows-count=100000 \
+          --sysdump-hubble-flows-timeout=15s \
+          --test-concurrency=5
 
     - name: Gather Cilium system dump
       if: failure()