[K/N] Remove old Compiler and Meta Version ^KT-55677 Fixed

* Replace it with KotlinCompilerVersion
* K/N version should be set now with `deployVersion`.
* Cleanup deprecated functions in older versions
 of the Gradle plugin
* Cleanup tests for older versions of compiler downloader

Merge-request: KT-MR-8436
Merged-by: Pavel Punegov <Pavel.Punegov@jetbrains.com>

kotlin-native/build-tools/build.gradle.kts

@@ -29,14 +29,13 @@ val rootProperties = Properties().apply {
 }
 
 val kotlinVersion = project.bootstrapKotlinVersion
-val konanVersion: String by rootProperties
 val slackApiVersion: String by rootProperties
 val ktorVersion: String by rootProperties
 val shadowVersion: String by rootProperties
 val metadataVersion: String by rootProperties
 
 group = "org.jetbrains.kotlin"
-version = konanVersion
+version = kotlinVersion
 
 repositories {
     maven("https://cache-redirector.jetbrains.com/maven-central")