[Gradle] KotlinCompilation: Remove .ownModuleName vs .moduleName duplication

This mechanism is simply not necessary anymore.
Just using the 'ownModuleName' as the value of 'moduleName' is
sufficient.

^KT-54312 Verification Pending

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinCompilation.kt

@@ -115,6 +115,7 @@ interface KotlinCompilation<out T : KotlinCommonOptionsDeprecated> : Named,
     override val relatedConfigurationNames: List<String>
         get() = super.relatedConfigurationNames + compileDependencyConfigurationName
 
+    @Deprecated("Scheduled for removal with Kotlin 1.9. Use compilerOptions instead")
     val moduleName: String
 
     val disambiguatedName

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/GradleKpmVariantCompilationData.kt

@@ -43,6 +43,4 @@ interface GradleKpmVariantCompilationData<T : KotlinCommonOptionsDeprecated> : K
 
     override val platformType: KotlinPlatformType
         get() = owner.platformType
-
-    override val ownModuleName: String
 }

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinCompilationData.kt

@@ -34,7 +34,6 @@ interface KotlinCompilationData<T : KotlinCommonOptionsDeprecated> {
     val platformType: KotlinPlatformType
 
     val moduleName: String
-    val ownModuleName: String
 
     @Deprecated(
         message = "Replaced with compilerOptions.options",