Always enable MBEDTLS_USE_PSA_CRYPTO: ssl-opt.sh

Remove `MBEDTLS_USE_PSA_CRYPTO` as a test dependency. It's now always on.

```
perl -i -pe 's/^requires_config_enabled MBEDTLS_USE_PSA_CRYPTO\n//' tests/ssl-opt.sh
```

Note that a few test cases remain with
`requires_config_disabled MBEDTLS_USE_PSA_CRYPTO`. This is deliberate:
they are restartable ECDH test cases that should be enabled eventually.
Mbed-TLS#7294

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

Author: gilles-peskine-arm