Refactor FIPS parameter and indicator handling

Refactor FIPS parameter and indicator handling

Consolidate FIPS indicators and self-test parameters into a single
structure managed by `fipsparams.pm`. Replace individual accessor
functions with a generic `ossl_fips_config` function that retrieves
values by name. This removes repetitive boilerplate code and
simplifies parameter access within the FIPS provider.

Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/30213)