modules: add rust modules files to MAINTAINERS

The module subsystem people agreed to maintain rust support for modules
[1]. Thus, add entries for relevant files to modules entry in MAINTAINERS.

Link: https://lore.kernel.org/all/[e-mail]/ [1]

Acked-by: Daniel Gomez <[e-mail]>
Signed-off-by: Andreas Hindborg <[e-mail]>
Tested-by: Daniel Gomez <[e-mail]>
Signed-off-by: Daniel Gomez <[e-mail]>

MAINTAINERS

···
 F:	kernel/module/
 F:	lib/test_kmod.c
 F:	lib/tests/module/
+F:	rust/kernel/module_param.rs
+F:	rust/macros/module.rs
 F:	scripts/module*
 F:	tools/testing/selftests/kmod/
 F:	tools/testing/selftests/module/