Remove WITH_NEW_INFERENCE directive from all tests

This directive anyway does not make test run twice with OI, and with NI
It only once run the test with specific settings (// LANGUAGE)
and ignores irrelevant (OI or NI tags)

compiler/testData/diagnostics/tests/operatorsOverloading/kt11300.fir.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 
 class A {
     operator fun get(x: Int): Int = x

compiler/testData/diagnostics/tests/operatorsOverloading/kt11300.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 
 class A {
     operator fun get(x: Int): Int = x

compiler/testData/diagnostics/tests/operatorsOverloading/kt13330.fir.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 //KT-13330 AssertionError: Illegal resolved call to variable with invoke
 
 fun foo(exec: (String.() -> Unit)?) = "".<!INAPPLICABLE_CANDIDATE!>exec<!><caret>() // <caret> is test data tag here

compiler/testData/diagnostics/tests/operatorsOverloading/kt13330.kt

@@ -1,4 +1,3 @@
-// !WITH_NEW_INFERENCE
 //KT-13330 AssertionError: Illegal resolved call to variable with invoke
 
 fun foo(exec: (String.() -> Unit)?) = "".<!UNSAFE_IMPLICIT_INVOKE_CALL, WRONG_NUMBER_OF_TYPE_ARGUMENTS{NI}!>exec<!><!WRONG_NUMBER_OF_TYPE_ARGUMENTS{OI}!><<!UNRESOLVED_REFERENCE!>caret<!>><!>() // <caret> is test data tag here