Read KotlinCompilerVersion from resource file

Writing build number into a public constant field leads to poor gradle
cache reuse between different builds. Public constant value is a part of
public api and its changes affect inputs of dependent modules.
Extracting build number to resource file allows to ignore it from
runtime classpath which fixes same problem for KotlinCompile tasks

prepare/build.version/build.gradle.kts

@@ -44,18 +44,6 @@ val writeStdlibVersion by tasks.registering {
     }
 }
 
-val writeCompilerVersion by tasks.registering {
-    val versionFile = rootDir.resolve("core/util.runtime/src/org/jetbrains/kotlin/config/KotlinCompilerVersion.java")
-    inputs.property("version", kotlinVersion)
-    outputs.file(versionFile)
-    doLast {
-        replaceVersion(versionFile, """public static final String VERSION = "([^"]+)"""") {
-            logger.lifecycle("Writing new compiler version: $kotlinVersion")
-            kotlinVersion
-        }
-    }
-}
-
 val writePluginVersion by tasks.registering {
     val versionFile = project(":idea").projectDir.resolve("resources/META-INF/plugin.xml")
     val pluginVersion = rootProject.findProperty("pluginVersion") as String?
@@ -71,5 +59,5 @@ val writePluginVersion by tasks.registering {
 }
 
 val writeVersions by tasks.registering {
-    dependsOn(writeBuildNumber, writeStdlibVersion, writeCompilerVersion)
+    dependsOn(writeBuildNumber, writeStdlibVersion)
 }