LibJS: Remove C++ AST

Delete AST.cpp, AST.h, ASTDump.cpp, ScopeRecord.h, and the dead
get_builtin(MemberExpression const&) from Builtins.cpp.

Extract ImportEntry and ExportEntry into a new ModuleEntry.h,
since they are data types used by the module system, not AST
node types.

Inline ModuleRequest's sorting constructor and
SourceRange::filename().

Remove the dead annex_b_function_declarations field from
EvalDeclarationData, which was only populated by the C++ parser.

Libraries/LibJS/SourceTextModule.h

@@ -10,6 +10,7 @@
 #include <LibJS/CyclicModule.h>
 #include <LibJS/Export.h>
 #include <LibJS/Forward.h>
+#include <LibJS/ModuleEntry.h>
 #include <LibJS/Runtime/ExecutionContext.h>
 
 namespace JS {