Make the -inform option to be respected if possible

Make the -inform option to be respected if possible

Add OSSL_STORE_PARAM_INPUT_TYPE and make it possible to be
set when OSSL_STORE_open_ex() or OSSL_STORE_attach() is called.

The input type format is enforced only in case the file
type file store is used.

By default we use FORMAT_UNDEF meaning the input type
is not enforced.

Fixes #14569

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15100)