fix #13994: initialise inline ctx in lateEnter

[bishabosha]

In lateEnter the context is captured in the namer by the inline body annotation in completeInCreationContext. So we initialise the context for inlining before calling lateEnter.

I've not figured out a way to replicate this in sbt scripted tests, but you can experiment by copying the sources from #13994 to library/src-bootstrapped

fixes #13994

[bishabosha]

Before this can be merged we need to add a test case that can reproduce the original issue - sbt scripted tests do not appear to work for this, I have been told that the cmdTests can be useful here

[bishabosha]

This is ready to review - the test case reproduces the issue in #13994, requiring the fixes to Run to succeed

[odersky]

I think we need some changes. Detailed review will follow

[odersky]

Maybe evaluate whether some of this can be moved to Namer and be merged with lateEnter there. It's important to keep driver classes like Run clean and not burden them with implementation detail.

[bishabosha]

@odersky I have moved most of the implementation of lateCompile to namer, except for a callback implemented in Run (for adding to finalizeActions)

[bishabosha]

@smarter I added a comment to the cmd tests, I have also found a way to parse the scala version in bash so I deleted the changes related to loading scala version from java properties.

[bishabosha]

@odersky would you like to check this again?

[odersky]

I think that way it is structured better than before.