FIR2IR: insert implicit not-null casts in delegated calls

compiler/testData/codegen/box/notNullAssertions/callAssertions.kt

@@ -1,6 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: NPE expected on calling foo
 // DISABLE_PARAM_ASSERTIONS
 
 // MODULE: lib

compiler/testData/codegen/box/notNullAssertions/delegation.kt

@@ -1,6 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
-// FIR status: Fail: should have been an exception
 // MODULE: lib
 // FILE: Delegation.java