Move a couple of functions out of dsymbol.d

[RazvanN7]

• findGetMembers is only used in toobj, but seems to be used from gdc so I didn't make it private.
• searchX is only used in typesem.d

[dlang-bot]

Thanks for your pull request and interest in making D better, @RazvanN7! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

• My PR is fully covered with tests (you can see the coverage diff by visiting the details link of the codecov check)
• My PR is as minimal as possible (smaller, focused PRs are easier to review than big ones)
• I have provided a detailed rationale explaining my changes
• New or modified functions have Ddoc comments (with Params: and Returns:)

Please see CONTRIBUTING.md for more information.

---

If you have addressed all reviews or aren't sure how to proceed, don't hesitate to ping us with a simple comment.

Bugzilla references

Your PR doesn't reference any Bugzilla issue.

If your PR contains non-trivial changes, please reference a Bugzilla issue or create a manual changelog.

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#15789"

[ibuclaw]

• findGetMembers is only used in toobj, but seems to be used from gdc so I didn't make it private.

Because it's needed for ModuleInfo runtime support!

[RazvanN7]

I moved it to typinf.d . looks like the appropriate place to put it in.

[thewilsonator]

frontend.h diff missing

 extern bool builtinTypeInfo(Type* t);
 
+extern FuncDeclaration* findGetMembers(ScopeDsymbol* dsym);
+
 class SemanticTimeTransitiveVisitor : public SemanticTimePermissiveVisitor
 {
 public:

[ibuclaw]

I moved it to typinf.d . looks like the appropriate place to put it in.

I'd tend to disagree - ModuleInfo != TypeInfo.