New transform API provide wrong and inconsistent input and output folder for transform.

For single file artifact like bundle
variant.artifacts.use(updateBundleArtifact)
.wiredWithFiles(
UpdateArtifactTask::initialArtifact,
UpdateArtifactTask::updatedArtifact
)
.toTransform(ArtifactType.BUNDLE)

it set this value
originalArtifact: app\build\outputs\bundle\debug\signDebugBundle\app-debug.aab
updatedArtifact: app\build\outputs\bundle\debug\debugUpdateArtifact\out

There are more weird things:
- why there is this "sign" prefix for the original file? It should be just "debugBundle"
- why output file is "out". and not app-debug.aab
- According to Xavier Ducrohet only the final artifact should be inside of outputs folder
- Then I don't see the reason for changing the name of the folder debugBundle to debugUpdateArtifact (if only final artifact should be there), it will really help with old plugins that will not use new variant API and will depend on the hardcoded path.
- I would really appreciate if there will be also the possibility to change the name of the output artifact during this transform, not the only file content.

And when I use this

variant.artifacts.use(updateApkArtifact)
.wiredWithDirectories(
UpdateDirArtifactTask::inputDir,
UpdateDirArtifactTask::outputDir
)
.toTransform(ArtifactType.APK)

It set this
Input folder: app\build\outputs\apk\debug
Output folder: app\build\intermediates\apk\debug\debugUpdateAPKArtifact

- output folder is inside of intermediates instead of input one
- also here I would expect that the output folder will be the same as the normal output folder for APK without transformation (for last one transformation in the chain). Why another level of the hierarchy?

There is one more unexpected thing that

val artifacts = builtArtifactsLoader.get().load(inputDir.get())
artifacts?.elements?.forEach {
it.outputFile is just String. I would expect File there.

Build: AI-202.7660.26.42.6987402, 202011210045,

AI-202.7660.26.42.6987402, JRE 11.0.8+10-b944.6842174x64 JetBrains s.r.o, OS Windows 10(amd64) v10.0 , screens 2560x1440, 2560x1440

AS: 4.2 Beta 1; Kotlin plugin: 1.4.20-release-Studio4.2-1; Android Gradle Plugin: 4.2.0-beta01; Gradle: 6.7; NDK: from local.properties: (not specified), latest from SDK: (not found); LLDB: pinned revision 3.1 not found, latest from SDK: (package not found); CMake: from local.properties: (not specified), latest from SDK: (not found), from PATH: (not found)

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