[analyzer][NFC][test] Add new RUN line with support-symbolic-integer-casts=true to expr-inspection.cpp

[martong]

Summary

Added a new run line to bolster gradual transition of handling cast operations,
see https://discourse.llvm.org/t/roadmap-of-modeling-symbolic-cast-operations/63107

[steakhal]

clang/test/Analysis/expr-inspection.cpp

10–14

[martong]

• Use template declarations

clang/test/Analysis/expr-inspection.cpp

10–14

Ok, done.

clang/test/Analysis/expr-inspection.cpp

-// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=debug.ExprInspection -verify %s
+// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=debug.ExprInspection \
+// RUN:    -analyzer-config support-symbolic-integer-casts=false \
+// RUN:    -verify %s
+
+// RUN: %clang_analyze_cc1 -x c++ -analyzer-checker=debug.ExprInspection \
+// RUN:    -analyzer-config support-symbolic-integer-casts=true \
+// RUN:    -verify %s
 
 // Self-tests for the debug.ExprInspection checker.
 
-void clang_analyzer_denote(int x, const char *str);
-void clang_analyzer_express(int x);
+template <typename T>
+void clang_analyzer_denote(T x, const char *str);
+template <typename T>
+void clang_analyzer_express(T x);
 
 // Invalid declarations to test basic correctness checks.
 void clang_analyzer_denote();
 void clang_analyzer_denote(int x);
 void clang_analyzer_express();
 
 void foo(int x, unsigned y) {
   clang_analyzer_denote(); // expected-warning{{clang_analyzer_denote() requires a symbol and a string literal}}