Categorize Provisioner Errors

[janmedrek]

Description

In the current state, the Provisioner is not returning any categorization for errors it may encounter. This may lead to situations where user waits for the unsuccessful end of the operation while they provided incorrect values that will never be used to fully provision a working cluster.

In order to avoid above situations, we need to categorize errors and return proper message/status in response, for example, bad request or internal server error.

Acceptance Criteria

• Error categorization introduced to Provisioner