Introduce support for plugin-defined intrinsics in JVM IR backend:

Add intrinsic for kotlinx.serialization.serializer<T>() function.

Plugin intrinsic for old backend is removed because it is too hard
and unjustifiable to unify them.

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/ReifiedTypeInliner.kt

@@ -72,7 +72,7 @@ class ReifiedTypeInliner<KT : KotlinTypeMarker>(
         fun applyPluginDefinedReifiedOperationMarker(
             insn: MethodInsnNode,
             instructions: InsnList,
-            type: KotlinType,
+            type: KT,
             asmType: Type
         ): Int = -1
     }
@@ -206,7 +206,7 @@ class ReifiedTypeInliner<KT : KotlinTypeMarker>(
         val applyResult = intrinsicsSupport.applyPluginDefinedReifiedOperationMarker(
             insn,
             instructions,
-            intrinsicsSupport.toKotlinType(type),
+            type,
             asmType
         )
         if (applyResult == -1) return false