Add support for multiple OpenID providers with role policies (#14223)

- When using multiple providers, claim-based providers are not allowed. All
providers must use role policies.

- Update markdown config to allow `details` HTML element

cmd/utils.go

@@ -905,7 +905,7 @@ func getMinioMode() string {
 }
 
 func iamPolicyClaimNameOpenID() string {
-	return globalOpenIDConfig.ClaimPrefix + globalOpenIDConfig.ClaimName
+	return globalOpenIDConfig.GetIAMPolicyClaimName()
 }
 
 func iamPolicyClaimNameSA() string {