Update regression test results for clang++-15 on ubuntu-latest (#1077)

Author: bluetarpmedia

regression-tests/test-results/clang-15/pure2-assert-expected-not-null.cpp.output

@@ -5,7 +5,7 @@ pure2-assert-expected-not-null.cpp2:7:10: error: no member named 'expected' in n
     std::expected<int,bool> ex {4}; 
     ~~~~~^~~~~~~~
          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/exception:107:8: note: 'unexpected' declared here
+/usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/exception:109:8: note: 'unexpected' declared here
   void unexpected() __attribute__ ((__noreturn__));
        ^
 pure2-assert-expected-not-null.cpp2:9:193: error: use of undeclared identifier 'ex'
@@ -18,7 +18,7 @@ pure2-assert-expected-not-null.cpp2:14:10: error: no member named 'expected' in
     std::expected<int,bool> ex {std::unexpected(false)}; 
     ~~~~~^~~~~~~~
          unexpected
-/usr/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/exception:107:8: note: 'unexpected' declared here
+/usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/exception:109:8: note: 'unexpected' declared here
   void unexpected() __attribute__ ((__noreturn__));
        ^
 pure2-assert-expected-not-null.cpp2:15:52: error: use of undeclared identifier 'ex'

regression-tests/test-results/clang-15/pure2-interpolation.cpp.execution

@@ -9,4 +9,4 @@ g0g0g
 pl(ug$h
 0pl(ug$h
 Dog kennel           color mauve      price 3.14       in stock = true
-Dog kennel           color mauve      price 3.14       in stock = true
+Dog kennel color mauve price 3.140000 in stock = true