cao: add idp-external-oidc-keycloak-aws workflow

Author: liouk

ci-operator/step-registry/idp/external-oidc/keycloak/aws/OWNERS

@@ -0,0 +1,11 @@
+approvers:
+  - heliubj18
+  - xingxingxia
+  - xiuwang
+  - liouk
+  - everettraven
+reviewers:
+  - xingxingxia
+  - xiuwang
+  - liouk
+  - everettraven

ci-operator/step-registry/idp/external-oidc/keycloak/aws/idp-external-oidc-keycloak-aws-workflow.metadata.json

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+{
+	"path": "idp/external-oidc/keycloak/aws/idp-external-oidc-keycloak-aws-workflow.yaml",
+	"owners": {
+		"approvers": [
+			"heliubj18",
+			"xingxingxia",
+			"xiuwang",
+			"liouk",
+			"everettraven"
+		],
+		"reviewers": [
+			"xingxingxia",
+			"xiuwang",
+			"liouk",
+			"everettraven"
+		]
+	}
+}

ci-operator/step-registry/idp/external-oidc/keycloak/aws/idp-external-oidc-keycloak-aws-workflow.yaml

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+workflow:
+  as: idp-external-oidc-keycloak-aws
+  steps:
+    allow_best_effort_post_steps: true
+    pre:
+    - chain: ipi-aws-pre
+    - chain: idp-external-oidc-keycloak
+    test:
+    - ref: openshift-e2e-test
+    post:
+    - chain: gather-core-dump
+    - chain: ipi-aws-post
+  documentation: |-
+    This workflow creates a cluster configured with External OIDC as auth provider with
+    an in-cluster Keycloak deployment and executes the common end-to-end-test suite on AWS.