ServerlessWorkflow Parser to return a comprenhensive list of errors

[fjtirado]

Description

The existing serverless workflow parser is designed to fail as soon as possible to not waste resources.
So, when an error is found the parser is aborted.
That means that if a workflow contain several errors, only the first one is reported.
Thats not good in some situations where iteration of changes is costly, like IA generators.
Therefore, we should modify the parser to collect as much errors as possible without changing the overall design.

Implementation ideas

No response