tree-wide: drop DLOPEN_FOO() macros

Since 4c0d8d9673, most dlopen notes are
set at the beginning of the executables. Let's manage all dlopen notes
there, rather than setting them where dlopen is called.

Note that the only exceptions are the LIBBPF_NOTE for networkd and
nsresource. Since dlopen_bpf() is wrapped in an `#if` guard, the notes
are instead set within the corresponding functionality.

As a result, the DLOPEN_FOO() wrapper macros are no longer needed and
can be dropped completely.

src/shared/cryptsetup-util.h

@@ -101,12 +101,6 @@ int cryptsetup_get_volume_key_id(struct crypt_device *cd, const char *volume_nam
 
 int dlopen_cryptsetup(int log_level) _dlopen_loader_;
 
-#define DLOPEN_CRYPTSETUP(log_level, priority)                          \
-        ({                                                              \
-                LIBCRYPTSETUP_NOTE(priority);                           \
-                dlopen_cryptsetup(log_level);                           \
-        })
-
 int cryptsetup_get_keyslot_from_token(sd_json_variant *v);
 
 const char* mangle_none(const char *s);