Consider deprecating `enableKotlinModuleRemapping` flag

[Goooler]

The flag was introduced due to #1874.

We can deprecate it and move

shadow/src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/tasks/ShadowCopyAction.kt

Lines 210 to 251 in cf531d4

	/**
	* Applies remapping to the given kotlin module with the specified relocation path. The remapped
	* module is then written to the zip file.
	*/
	@OptIn(UnstableMetadataApi::class)
	private fun FileCopyDetails.remapKotlinModule() =
	file.readBytes().let { bytes ->
	val kmMetadata = KotlinModuleMetadata.read(bytes)
	val newKmModule =
	KmModule().apply {
	// We don't need to relocate the nested properties in `optionalAnnotationClasses`, there
	// is a very special use case for Kotlin Multiplatform.
	optionalAnnotationClasses += kmMetadata.kmModule.optionalAnnotationClasses
	packageParts +=
	kmMetadata.kmModule.packageParts.map { (pkg, parts) ->
	val relocatedPkg = relocators.relocateClass(pkg)
	val relocatedParts =
	KmPackageParts(
	parts.fileFacades.mapTo(mutableListOf()) { relocators.relocatePath(it) },
	parts.multiFileClassParts.entries.associateTo(mutableMapOf()) { (name, facade)
	->
	relocators.relocatePath(name) to relocators.relocatePath(facade)
	},
	)
	relocatedPkg to relocatedParts
	}
	}
	val newKmMetadata = KotlinModuleMetadata(newKmModule, kmMetadata.version)
	val newBytes = newKmMetadata.write()
	val relocatedPath = relocators.relocatePath(path)
	val entryName =
	when {
	relocatedPath != path -> relocatedPath
	// Nothing changed, so keep the original path.
	newBytes.contentEquals(bytes) -> path
	// Content changed but path didn't, so rename to avoid name clash. The filename does not
	// matter to the compiler.
	else -> path.replace(".kotlin_module", ".shadow.kotlin_module")
	}
	writeToZip(entryName = entryName, bytes = newBytes)
	}

into a new ResourceTransformer in the next major version. Users who want to remap the module files will need to apply the new ResourceTransformer explicitly.