[PR #9987/a8b97732 backport][stable-9] Fix Keycloak authentication flow configuration issues (#10017)

Fix Keycloak authentication flow configuration issues (#9987)

* Add delete_authentication_config method and integrate it into create_or_update_executions

* typo

* Sanity

* Add integration tests for keycloak_authentication module with README, tasks, and variables

* Add copyright and license information to access_token.yml

* Sanity

* Refactor Keycloak integration tests: streamline README, update access token task, and enhance variable management

* Maj changelogs fragments

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Co-authored-by: Andre Desrosiers <andre.desrosiers@ssss.gouv.qc.ca>
(cherry picked from commit a8b977320c)

Co-authored-by: desand01 <desrosiers.a@hotmail.com>

plugins/modules/keycloak_authentication.py

@@ -308,6 +308,8 @@ def create_or_update_executions(kc, config, realm='master'):
                         }
                         # add the execution configuration
                         if new_exec["authenticationConfig"] is not None:
+                            if "authenticationConfig" in execution and "id" in execution["authenticationConfig"]:
+                                kc.delete_authentication_config(execution["authenticationConfig"]["id"], realm=realm)
                             kc.add_authenticationConfig_to_execution(updated_exec["id"], new_exec["authenticationConfig"], realm=realm)
                         for key in new_exec:
                             # remove unwanted key for the next API call