[JS IR] Build stdlib using compiler from repo

Previously JS IR versions of stdlib and kotlin-test were build
by default using compiler previously built on a buildserver.

It had some issues:
 - This required us to advance bootstrap every time we made any
   incompatible IR changes. This happens often since IR ABI is
   not quite stable yet.

 - We never tested the exact combination of compiler and stdlib we publish

   We tested:
    - new compiler with new stdlib build by new compiler (in box tests)
    - old compiler with new stdlib build by old compiler (in stdlib tests)

   We published:
    - new compiler with new stdlib build by old compiler

After this change JS IR compiler tests, builds and publishes
single configuration:

    new compiler with new stdlib build by new compiler

JS IR stdlib and kotlin-test are now built using JavaExec of CLI instead
of Gradle plugin to avoid troubles of loading a freshly built plugin.

This also allows to have a granular dependencies: we don't rebuild klib
if we changed a lowering in a compiler backend, but we do rebuild it if
we changed IR serialization algorithm.

prepare/compiler/build.gradle.kts

@@ -90,7 +90,6 @@ val distLibraryProjects = listOfNotNull(
     ":js:js.engines",
     ":kotlin-stdlib-js-ir".takeIf { kotlinBuildProperties.jsIrDist },
     ":kotlin-source-sections-compiler-plugin",
-    ":kotlin-test:kotlin-test-js".takeIf { !kotlinBuildProperties.isInJpsBuildIdeaSync },
     ":kotlin-test:kotlin-test-junit",
     ":kotlin-test:kotlin-test-junit5",
     ":kotlin-test:kotlin-test-jvm",
@@ -149,6 +148,7 @@ dependencies {
     libraries(kotlinStdlib("jdk8"))
     if (!kotlinBuildProperties.isInJpsBuildIdeaSync) {
         libraries(kotlinStdlib("js", "distLibrary"))
+        libraries(project(":kotlin-test:kotlin-test-js", configuration = "distLibrary"))
     }
 
     distLibraryProjects.forEach {