The softhsm is terribly slow in the uri test

[Jakuje]

Describe the bug
Sometimes, softhsm is very slow on the macos in the uri test. We bumped the timeout to 90 second (while it takes 5 on other combinations), but it still sometimes times out:

79/88 pkcs11-provider:softhsm / uri            TIMEOUT        90.05s   killed by signal 15 SIGTERM

Checking the output, I saw 265 queries to openssl with different uris in

https://github.com/latchset/pkcs11-provider/actions/runs/12995228522/job/36241470911

On main, this finished in 80 seconds (we probably got a faster machine):

79/88 pkcs11-provider:softhsm / uri            OK             82.56s

https://github.com/latchset/pkcs11-provider/actions/runs/12995441028/job/36242150007

Softoken ran the same test for 40 seconds (but note, that it has fewer tests as it does not support RSA-PSS with ALLOWED_MECHANISMS and EdDSA keys:

78/88 pkcs11-provider:softokn / uri            OK             40.51s

On Linux, this test is bit faster, but it still takes a lot of time in softhsm compared to softokn:

79/88 pkcs11-provider:softhsm / uri            OK             46.47s
78/88 pkcs11-provider:softokn / uri            OK              5.80s

To Reproduce
Run all tests

Expected behavior
No timeouts

Operating environment (please complete the following information):

• OS: MacOS
• Version 14

Token and application used (please complete the following information):

• Device: SoftHSM
• PKCS11 Driver version: ?

Additional context
We can bump the timeout even more, try to cut some objects (>200 objects is quite a lot -- I am not even sure where does this come from) or drop softhsm altogether (but I still find it quite useful).