MEDIUM: ssl: introduce src/fips.c with TLS version check

MEDIUM: ssl: introduce src/fips.c with TLS version check

Add src/fips.c and include/haproxy/fips.h to centralise FIPS compliance
checks for AWS-LC builds.

ssl_fips_check_version() verifies that ssl-min-ver is not set below
TLS 1.2, which AWS-LC in FIPS mode would refuse to negotiate.

The check accepts an enum obj_type * so it can resolve the owning
bind/server and produce a precise error message including the proxy
and object name in the standard HAProxy 'type proxy/name' form.