Native: don't set allWarningsAsErrors = true in K2 mode

Related to KT-54123

kotlin-native/Interop/Indexer/build.gradle.kts

@@ -175,7 +175,6 @@ val compileKotlin: org.jetbrains.kotlin.gradle.tasks.KotlinCompile by tasks
 
 tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
     kotlinOptions {
-        allWarningsAsErrors = true
         freeCompilerArgs += listOf("-Xskip-prerelease-check")
     }
 }

kotlin-native/Interop/Runtime/build.gradle.kts

@@ -77,7 +77,6 @@ tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach
             "-opt-in=kotlin.ExperimentalUnsignedTypes",
             "-Xskip-prerelease-check"
         )
-        allWarningsAsErrors = true
     }
 }
 

kotlin-native/Interop/Skia/build.gradle

@@ -24,9 +24,3 @@ dependencies {
     implementation project(":kotlin-native:Interop:Indexer")
     implementation project(":kotlin-native:Interop:StubGenerator")
 }
-
-compileKotlin {
-    kotlinOptions {
-        allWarningsAsErrors=true
-    }
-}

kotlin-native/Interop/StubGenerator/build.gradle.kts

@@ -50,7 +50,6 @@ tasks {
                 "-opt-in=kotlin.ExperimentalUnsignedTypes",
                 "-Xskip-metadata-version-check"
             )
-            allWarningsAsErrors = true
         }
     }
 

kotlin-native/backend.native/build.gradle

@@ -33,7 +33,6 @@ sourceSets {
 
 compileCompilerKotlin {
     kotlinOptions.jvmTarget = "1.8"
-    kotlinOptions.allWarningsAsErrors=true
     kotlinOptions.freeCompilerArgs += ['-opt-in=kotlin.RequiresOptIn', '-opt-in=org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI', '-Xskip-prerelease-check']
 }