JVM: Check for multiple {POP, Unit} sequences in suspend function TCO

We already check for {POP, Unit} sequence before ARETURN, but if the
there are multiple sequence before ARETURN, the compiler assumes, that
TCO misses.

The fix is to check, that the instruction after the sequence is either
ARETURN or another {POP, Unit} sequence.

 #KT-50835
 #KT-54152 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/TailCallOptimization.kt

@@ -87,7 +87,7 @@ private val AbstractInsnNode.nextMeaningful: AbstractInsnNode?
     get() = next.skipUntilMeaningful()
 
 private val AbstractInsnNode.isReturnUnit: Boolean
-    get() = isUnitInstance() && nextMeaningful?.opcode == Opcodes.ARETURN
+    get() = isUnitInstance() && nextMeaningful?.let { it.opcode == Opcodes.ARETURN || it.isPopBeforeReturnUnit } == true
 
 private val AbstractInsnNode.isPopBeforeReturnUnit: Boolean
     get() = opcode == Opcodes.POP && nextMeaningful?.isReturnUnit == true