Disable clang format around .c includes

Disable clang format around .c includes

we assume these to be order sensitive and not self contained, so
as per our new style we disable clang format around them.

we should consider renaming to .inc, or doing away with some
of these and just putting the code inline, but that's for
later consideration.

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Nikola Pajkovsky <nikolap@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/29241)