Let the Kotlin DSL IDE script editor resolver support non-jvm IJ projects

[eskatos]

This is about supporting the rich Kotlin DSL script editor in IntelliJ projects that are not JVM based, e.g. python, javascript, native ...

Expected Behavior

Editing a .gradle.kts script in IntelliJ IDEs in a Gradle project that is not JVM based, iow where the Project SDK isn't a JVM, should work in the same way as with JVM based projects.

Current Behavior

Non JVM based IntelliJ IDEs don't support the rich Kotlin DSL script editor for .gradle.kts files when the Project SDK is not a JVM.

Implementation notes

This will require coordinated changes to both the Kotlin IntelliJ Plugin and Gradle.

First, https://youtrack.jetbrains.com/issue/KT-31152 need to be fixed in a released Kotlin version.

Then our KotlinBuildScriptDependenciesResolver need to relay the javaHome environment in the returned script dependencies.

For more details, see the original report gradle/kotlin-dsl-samples#1354.

A previous attempt was made in Gradle 5.4 #8756 but it made that Kotlin issue linked above very visible, hence reverted in Gradle 5.4.1 #9195

[eskatos]

KT-31152 is marked as fixed for Kotlin 1.3.50

[NataliaUkhorskaya]

@eskatos Yes, the fix was chipped with 1.3.50. So is it possible to revert the fix in some next version of Gradle?

[eskatos]

Fixed in #10350, will ship in 6.0