Modify IDE Hook to work with configuration cache

[lehmanju]

This changes the implementation of the IDE hook to work with Gradle's configuration cache. Essentially, the old IDE hook implementation is deleted and the execution of the regular spotless task is augmented to filter the files before applying changes. If the property is missing, it just works like before.

As stdIn/stdOut properties are missing, I don't expect this to be merged in its current state, but I'd like to hear some feedback whether the approach is feasible. Ideally, I would also integrate #1101.

fixes #1082

[lehmanju]

I changed the behavior to enable/disable the task based on whether a file is in the target set. This works quite well and avoids task execution for all other projects.

[nedtwigg]

This seems like a great approach if you can get it to work!

[nedtwigg]

Oh! Sorry, I spoke a bit too soon. This is going to interact a bit with the linting changes...

• Linting - breaking changes to internal API to prepare #2148
• Linting - API #2149

I'll try to get this ironed out this weekend...

[lehmanju]

This seems like a great approach if you can get it to work!

Yeah, the only thing that isn't working right now is the IDEHook test.

Tasks with empty target are disabled, which leaves only one task with exactly one file. Reexecuting on the same file successfully uses the configuration cache.

I plan to look into supporting multiple files at once. Maybe this can be integrated into IntelliJ IDEA to format all files before commiting.