FIR checker: differentiate unsafe infix/operator calls from UNSAFE_CALL

compiler/testData/diagnostics/tests/nullabilityAndSmartCasts/InfixCallNullability.fir.kt

@@ -18,15 +18,15 @@ fun test(x : Int?, a : A?) {
 
     a<!UNSAFE_CALL!>.<!>plus(1)
     a?.plus(1)
-    a <!UNSAFE_CALL!>plus<!> 1
-    a <!UNSAFE_CALL!>+<!> 1
+    a <!UNSAFE_INFIX_CALL!>plus<!> 1
+    a <!UNSAFE_OPERATOR_CALL!>+<!> 1
     <!UNSAFE_CALL!>-<!>a
     a<!UNSAFE_CALL!>.<!>unaryMinus()
     a?.unaryMinus()
 
     a<!UNSAFE_CALL!>.<!>div(1)
-    a <!UNSAFE_CALL!>/<!> 1
-    a <!UNSAFE_CALL!>div<!> 1
+    a <!UNSAFE_OPERATOR_CALL!>/<!> 1
+    a <!UNSAFE_INFIX_CALL!>div<!> 1
     a?.div(1)
 
     a.times(1)
@@ -34,8 +34,8 @@ fun test(x : Int?, a : A?) {
     a times 1
     a?.times(1)
 
-    1 <!UNSAFE_CALL!>in<!> a
-    a <!UNSAFE_CALL!>contains<!> 1
+    1 <!UNSAFE_OPERATOR_CALL!>in<!> a
+    a <!UNSAFE_INFIX_CALL!>contains<!> 1
     a<!UNSAFE_CALL!>.<!>contains(1)
     a?.contains(1)
 }

compiler/testData/diagnostics/tests/regressions/kt282.fir.kt

@@ -14,6 +14,6 @@ fun f(): Unit {
     val i : Int? = null
     i <!NONE_APPLICABLE!>+<!> 1
     set + 1
-    1 <!UNSAFE_CALL!>in<!> set
+    1 <!UNSAFE_OPERATOR_CALL!>in<!> set
     1 in 2
 }

compiler/testData/diagnostics/tests/smartCasts/publicVals/open.fir.kt

@@ -7,5 +7,5 @@ infix fun Int.bar(i: Int) = i
 fun test() {
     val p = A()
     // For open value properties, smart casts should not work
-    if (p.foo is Int) p.foo <!UNSAFE_CALL!>bar<!> 11
+    if (p.foo is Int) p.foo <!UNSAFE_INFIX_CALL!>bar<!> 11
 }