Reduce change to compiler invocation and remove options from frontend

Author: cmcgee1024

include/swift/Option/Options.td

@@ -1779,8 +1779,12 @@ def emit_symbol_graph_dir : Separate<["-"], "emit-symbol-graph-dir">,
   HelpText<"Emit a symbol graph to directory <dir>">,
   MetaVarName<"<dir>">;
 
+def symbol_graph_pretty_print: Flag<["-"], "symbol-graph-pretty-print">,
+  Flags<[NoInteractiveOption, HelpHidden]>,
+  HelpText<"Pretty-print the output symbol graph JSON">;
+
 def symbol_graph_skip_synthesized_members: Flag<["-"], "symbol-graph-skip-synthesized-members">,
-  Flags<[FrontendOption, NoInteractiveOption, SupplementaryOutput, HelpHidden]>,
+  Flags<[NoInteractiveOption, HelpHidden]>,
   HelpText<"Skip members inherited through classes or default implementations">;
 
 def symbol_graph_minimum_access_level: Separate<["-"], "symbol-graph-minimum-access-level">,

lib/Frontend/CompilerInvocation.cpp

@@ -2257,9 +2257,6 @@ static void ParseSymbolGraphArgs(symbolgraphgen::SymbolGraphOptions &Opts,
       Args.hasFlag(OPT_emit_extension_block_symbols,
                    OPT_omit_extension_block_symbols, /*default=*/false);
 
-  Opts.PrettyPrint = Args.hasArg(OPT_pretty_print);
-  Opts.EmitSynthesizedMembers = !Args.hasArg(OPT_symbol_graph_skip_synthesized_members);
-
   if (auto *A = Args.getLastArg(OPT_symbol_graph_minimum_access_level)) {
     Opts.MinimumAccessLevel =
         llvm::StringSwitch<AccessLevel>(A->getValue())
@@ -2286,6 +2283,8 @@ static void ParseSymbolGraphArgs(symbolgraphgen::SymbolGraphOptions &Opts,
   }
 
   // default values for generating symbol graphs during a build
+  Opts.PrettyPrint = false;
+  Opts.EmitSynthesizedMembers = true;
   Opts.PrintMessages = false;
   Opts.IncludeClangDocs = false;
 }