Rename KotlinJavaToolchainProvider to DefaultKotlinJavaToolchain.

'Provider' suffix doesn't make sense.

^KT-45611 In Progress
^KT-43095 In Progress

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/kapt/KaptTask.kt

@@ -126,7 +126,7 @@ abstract class KaptTask @Inject constructor(
     abstract val classpath: ConfigurableFileCollection
 
     @get:Internal
-    internal val defaultKotlinJavaToolchain: Provider<KotlinJavaToolchainProvider> = objectFactory
+    internal val defaultKotlinJavaToolchain: Provider<DefaultKotlinJavaToolchain> = objectFactory
         .propertyWithNewInstance(
             project.gradle,
             { null }

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/DefaultKotlinJavaToolchain.kt

@@ -27,7 +27,7 @@ import java.io.File
 import javax.inject.Inject
 import kotlin.reflect.full.functions
 
-internal abstract class KotlinJavaToolchainProvider @Inject constructor(
+internal abstract class DefaultKotlinJavaToolchain @Inject constructor(
     private val objects: ObjectFactory,
     projectLayout: ProjectLayout,
     gradle: Gradle,

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -461,7 +461,7 @@ abstract class KotlinCompile @Inject constructor(
     abstract val useClasspathSnapshot: Property<Boolean>
 
     @get:Internal
-    internal val defaultKotlinJavaToolchain: Provider<KotlinJavaToolchainProvider> = objects
+    internal val defaultKotlinJavaToolchain: Provider<DefaultKotlinJavaToolchain> = objects
         .propertyWithNewInstance(
             project.gradle,
             { this }