Fix OSSL_STORE to consider cached info in the EOF check.

Fix OSSL_STORE to consider cached info in the EOF check.

OSSL_STORE_load() called OSSL_STORE_eof() before checking if there is
cached OSSL_STORE_INFO to consider.  To fix this issue, the cached info
check is moved to OSSL_STORE_eof(), as that seems to make most common
sense.

This solves an issue with PKCS#12 files, where the cached info was never
considered because the underlying file IO layer signaled that EOF is
reached.

Fixes #28010

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/28016)