Deployment fails when KeystonePasswordRegex is used

Issue

• We are trying to implement the password regex pattern by adding KeystonePasswordRegex in deployment templates

parameter_defaults:
  KeystonePasswordRegex: '^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,10}$'
  KeystonePasswordRegexDescription: Passwords must contain at least 1 lowercase letter, 1 uppercase letter, at least 1 digit, and 1 symbol and be a minimum length of 8 characters.

• When the above setting is included, deployment constantly fails with the below error:

    2022-07-23 13:35:35,966 p=703940 u=mistral n=ansible | 2022-07-23 13:35:35.966436 | 52540090-9f6e-xxxx-xxxx-00000001b0dc |      FATAL | Create admin user | undercloud | error={"changed": false, "extra_data": {"data": null, "details": "The password does not match the requirements: Passwords must contain at least 1 capital letter,1 small letter, 1 digit, 1 special character and be a minimum length of 8 characters..", "response": "{\"error\":{\"code\":400,\"message\":\"The password does not match the requirements: Passwords must contain at least 1 capital letter,1 small letter, 1 digit, 1 special character and be a minimum length of 8 characters..\",\"title\":\"Bad Request\"}}\n"}, "msg": "Error in updating user a4d14d34791f48e49071106e6905fb8e: Client Error for url: https://10.xxx.xx.1x0:13000/v3/users/a4d14d34xxxxx49071106xx905fb8e, The password does not match the requirements: Passwords must contain at least 1 capital letter,1 small letter, 1 digit, 1 special character and be a minimum length of 8 characters.."}