[Feature] Integrate FluxCD extension in AKS with Azure DevOps without using PATs

[hadberg]

Is your feature request related to a problem? Please describe.
When configuring the Flux integration with Azure DevOps only option out-of-the-box appears to be through personal access tokens.

Describe the solution you'd like
We would like to be able to integrate the flux extension with Azure DevOps through a service principal or workload identity. Basically using any authentication mechanism that is not tied to a personal user account.

Describe alternatives you've considered

1. Using a PAT which we really would like to avoid
2. A custom service principal solution with a container continuously requesting a new access token for the service principal and updating the flux pods with the returned token.

[Carsondraper]

Yes, please add this! For companies that enforce a short PAT lifetime, it is very cumbersome to re authenticate each Gitops configuration with a new PAT token every x number of days.