[Native] Add -Xoverride-konan-properties to cinterop.

This aligns with the flag added to kotlinc in:
https://youtrack.jetbrains.com/issue/KT-40670

Hermetic builds would benefit from being able to override dependency paths or airplaneMode using this mechanism:

```
$ bin/cinterop -Xoverride-konan-properties "apple-llvm-20200714-macos-x64-essentials.default=/tmp/llvm;airplaneMode=true" -def baz.def
```

kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/jvm/CommandLine.kt

@@ -65,6 +65,10 @@ open class CommonInteropArguments(val argParser: ArgParser) {
             description = "save temporary files to the given directory")
     val kotlincOption by argParser.option(ArgType.String, "Xkotlinc-option",
             description = "additional kotlinc compiler option").multiple()
+    val overrideKonanProperties by argParser.option(ArgType.String,
+            fullName = "Xoverride-konan-properties",
+            description = "Override konan.properties.values"
+        ).multiple().delimiter(";")
 
     companion object {
         val DEFAULT_MODE = GenerationMode.METADATA

kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/jvm/ToolConfig.kt

@@ -22,10 +22,10 @@ import org.jetbrains.kotlin.konan.util.defaultTargetSubstitutions
 import org.jetbrains.kotlin.native.interop.gen.jvm.KotlinPlatform
 import org.jetbrains.kotlin.native.interop.indexer.Language
 
-class ToolConfig(userProvidedTargetName: String?, private val flavor: KotlinPlatform) {
+class ToolConfig(userProvidedTargetName: String?, private val flavor: KotlinPlatform, private val propertyOverrides: Map<String, String>) {
 
     private val konanHome = KonanHomeProvider.determineKonanHome()
-    private val distribution = customerDistribution(konanHome)
+    private val distribution = Distribution(konanHome, propertyOverrides = propertyOverrides)
     private val platformManager = PlatformManager(distribution)
     private val targetManager = platformManager.targetManager(userProvidedTargetName)
     private val host = HostManager.host

kotlin-native/Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/jvm/main.kt

@@ -214,7 +214,7 @@ private fun processCLib(flavor: KotlinPlatform, cinteropArguments: CInteropArgum
         cinteropArguments.argParser.printError("-def or -pkg should be provided!")
     }
 
-    val tool = prepareTool(cinteropArguments.target, flavor)
+    val tool = prepareTool(cinteropArguments.target, flavor, parseKeyValuePairs(cinteropArguments.overrideKonanProperties))
 
     val def = DefFile(defFile, tool.substitutions)
     val isLinkerOptsSetByUser = (cinteropArguments.linkerOpts.valueOrigin == ArgParser.ValueOrigin.SET_BY_USER) ||
@@ -453,8 +453,8 @@ private fun resolveDependencies(
     ).getFullList(TopologicalLibraryOrder)
 }
 
-internal fun prepareTool(target: String?, flavor: KotlinPlatform): ToolConfig {
-    val tool = ToolConfig(target, flavor)
+internal fun prepareTool(target: String?, flavor: KotlinPlatform, propertyOverrides: Map<String, String> = emptyMap()): ToolConfig {
+    val tool = ToolConfig(target, flavor, propertyOverrides)
     tool.downloadDependencies()
 
     System.load(tool.libclang)
@@ -527,3 +527,15 @@ internal fun buildNativeLibrary(
             headerFilter = headerFilter
     )
 }
+
+private fun parseKeyValuePairs(
+    argumentValue: List<String>,
+): Map<String, String> = argumentValue.mapNotNull {
+    val keyValueSeparatorIndex = it.indexOf('=')
+    if (keyValueSeparatorIndex > 0) {
+        it.substringBefore('=') to it.substringAfter('=')
+    } else {
+        warn("incorrect property format: expected '<key>=<value>', got '$it'")
+        null
+    }
+}.toMap()