FIR: add UnsafeCall resolution diagnostics

Previously unsafe call is reported as part of InapplicableWrongReceiver.
This makes it difficult for the downstream checkers to report different
diagnostics.

compiler/fir/analysis-tests/testData/resolve/smartcasts/variables/delayedAssignment.dot

@@ -77,7 +77,7 @@ digraph delayedAssignment_kt {
                 32 [label="Exit when"];
             }
             33 [label="Access variable R|<local>/a|"];
-            34 [label="Function call: R|<local>/a|.<Inapplicable(INAPPLICABLE_WRONG_RECEIVER): /A.foo>#()"];
+            34 [label="Function call: R|<local>/a|.<Inapplicable(UNSAFE_CALL): /A.foo>#()"];
             35 [label="Exit block"];
         }
         36 [label="Exit function test" style="filled" fillcolor=red];

compiler/fir/analysis-tests/testData/resolve/smartcasts/variables/delayedAssignment.fir.txt

@@ -20,5 +20,5 @@ FILE: delayedAssignment.kt
             }
         }
 
-        R|<local>/a|.<Inapplicable(INAPPLICABLE_WRONG_RECEIVER): /A.foo>#()
+        R|<local>/a|.<Inapplicable(UNSAFE_CALL): /A.foo>#()
     }

compiler/fir/analysis-tests/testData/resolve/smartcasts/variables/smartcastAfterReassignment.dot

@@ -103,7 +103,7 @@ digraph smartcastAfterReassignment_kt {
             40 [label="Const: Null(null)"];
             41 [label="Assignment: R|<local>/x|"];
             42 [label="Access variable R|<local>/x|"];
-            43 [label="Access variable <Inapplicable(INAPPLICABLE_WRONG_RECEIVER): kotlin/String.length>#"];
+            43 [label="Access variable <Inapplicable(UNSAFE_CALL): kotlin/String.length>#"];
             44 [label="Exit block"];
         }
         45 [label="Exit function test_3" style="filled" fillcolor=red];

compiler/fir/analysis-tests/testData/resolve/smartcasts/variables/smartcastAfterReassignment.fir.txt

@@ -19,5 +19,5 @@ FILE: smartcastAfterReassignment.kt
         R|<local>/x| = String()
         R|<local>/x|.R|kotlin/String.length|
         R|<local>/x| = Null(null)
-        R|<local>/x|.<Inapplicable(INAPPLICABLE_WRONG_RECEIVER): kotlin/String.length>#
+        R|<local>/x|.<Inapplicable(UNSAFE_CALL): kotlin/String.length>#
     }