Revert "linkers: darwin: do not use -bundle for shared_modules"

This reverts commit d0d7af3.

This patch should not have been backported but was added to the
milestone by accident. It's a risky change. It also broke building
postgres on macOS.

See:
#14340 (comment)

And discussion of a better fix:
#14444 (comment)
#14444 (comment)

Author: eli-schwartz

docs/markdown/Builtin-options.md

@@ -257,7 +257,8 @@ with `b_asneeded`, so that option will be silently disabled.
 
 [[shared_module]]s will not have
 bitcode embedded because `-Wl,-bitcode_bundle` is incompatible with
-`-Wl,-undefined,dynamic_lookup` which is necessary for shared modules to work.
+both `-bundle` and `-Wl,-undefined,dynamic_lookup` which are necessary
+for shared modules to work.
 
 ## Compiler options
 

mesonbuild/linkers/linkers.py

@@ -795,7 +795,7 @@ def get_allow_undefined_args(self) -> T.List[str]:
         return self._apply_prefix('-undefined,dynamic_lookup')
 
     def get_std_shared_module_args(self, options: 'KeyedOptionDictType') -> T.List[str]:
-        return ['-dynamiclib'] + self._apply_prefix('-undefined,dynamic_lookup')
+        return ['-bundle'] + self._apply_prefix('-undefined,dynamic_lookup')
 
     def get_pie_args(self) -> T.List[str]:
         return []