Remove use of _Static_assert

Remove use of _Static_assert

We had some use of the C11 _Static_assert feature which can cause some
problems on some platforms. Everywhere we were using it, it is not really
required so remove it.

Fixes #22017

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22091)