[Allure] Implement Vault for secret management and key rotation

[i5okie]

Inventory of Credentials

Secret Name	Key	Type	Instances	Notes
allure-service	username	username	allure-service	The username for the admin account.
allure-service	password	password	allure-service	The password for the admin account.
allure-service	public-username	username	allure-service	The username for the public account.
allure-service	public-password	password	allure-service	The password for the public account.