Remote dev mode fails on missing project directory

[mswiderski]

this addresses the issue #15494 as the project directory is explicitly set to null here

@geoand you might be interested in this :)

with that remote dev mode starts and works!

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[geoand]

Thanks for this!

@aloubyansky is the best person to review I would say

[aloubyansky]

I don't see the project dir being consumed from the CompilationProvider in Quarkus core. I am wondering whether we need it at all. Perhaps for Kogito? @mariofusco @evacchi

[evacchi]

we do; are there "proper" ways to query for that value? /cc @danielezonca @mariofusco @tarilabs

[aloubyansky]

I think it's ok. I just wanted to clarify that. Thanks @evacchi