Userland: Use allocation-failure safe functions where it's easy

I went through all callers of adopt_own() and replaced them with
try_make<>() if possible or adopt_nonnull_own_or_enomem() else
in cases where it was easy (i.e. in functions already returning
ErrorOr).

No intended behavior change.

Userland/Libraries/LibGLSL/Compiler.cpp

@@ -12,7 +12,7 @@ ErrorOr<NonnullOwnPtr<ObjectFile>> Compiler::compile(Vector<String> const&)
 {
     // FIXME: implement this function
     m_messages = {};
-    return adopt_own(*new ObjectFile());
+    return try_make<ObjectFile>();
 }
 
 }