ci: fix matrix runner spec (#3380)

Author: msanft

.github/workflows/e2e-test-release.yml

@@ -272,26 +272,31 @@ jobs:
             attestationVariant: "gcp-sev-es"
             kubernetes-version: "v1.30"
             clusterCreation: "cli"
+            runner: "ubuntu-22.04"
           - test: "malicious join"
             refStream: "ref/main/stream/debug/?"
             attestationVariant: "gcp-sev-snp"
             kubernetes-version: "v1.30"
             clusterCreation: "cli"
+            runner: "ubuntu-22.04"
           - test: "malicious join"
             refStream: "ref/main/stream/debug/?"
             attestationVariant: "azure-sev-snp"
             kubernetes-version: "v1.30"
             clusterCreation: "cli"
+            runner: "ubuntu-22.04"
           - test: "malicious join"
             refStream: "ref/main/stream/debug/?"
             attestationVariant: "azure-tdx"
             kubernetes-version: "v1.30"
             clusterCreation: "cli"
+            runner: "ubuntu-22.04"
           - test: "malicious join"
             refStream: "ref/main/stream/debug/?"
             attestationVariant: "aws-sev-snp"
             kubernetes-version: "v1.30"
             clusterCreation: "cli"
+            runner: "ubuntu-22.04"
 
           #
           # Tests on macOS runner