browser: v23test: migrate remaining 'modules' clients to v23test
browser: v23test: migrate remaining 'modules' clients to v23test

Once this CL is in, we should be able to delete 'modules'.

MultiPart: 2/3

Change-Id: I1ae0bbab6df2346c8ea12d295987cd588886c578

vanadium/browser,vanadium/browser,vanadium/browser,vanadium/browser