* Add proxy service template
* Replace SA srv with proxy for external SA srv
* Move service account prefix to a constant
* Prevent deletion from external service account
* Make SA validation a resusable function
* Add protection for creating service accounts
* Add protection when updating service accounts
* Add IsExternal field for service account
* Protect ext service account token generation
* Add verbose errors for form name or sa name
* add tests
* Add logs
* Adjusts tests
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Co-authored-by: Misi <mgyongyosi@users.noreply.github.com>
Co-authored-by: Gabriel MABILLE <gamab@users.noreply.github.com>