test313: disable CRL test for Schannel due to lack of support and flakiness

The source code and documentation says that CRL is not supported by
curl's Schannel TLS backend.

It's also frequently flaky in CI with both MinGW and MSVC jobs, e.g.:
https://github.com/curl/curl/actions/runs/14134841988/job/39603994164 (Schannel)
https://github.com/curl/curl/actions/runs/14134841988/job/39606336445 (Schannel)
https://github.com/curl/curl/actions/runs/13981383629/job/39147183706 (LibreSSL)

```
curl returned 35, when expecting 60
```

This test was passing with Schannel because it misses the `--insecure`
option and thus always returns 60, regardless of passing `--crlfile` or
not:
```
curl: (60) schannel: CertGetCertificateChain trust error CERT_TRUST_REVOCATION_STATUS_UNKNOWN
More details here: https://curl.se/docs/sslcerts.html

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the webpage mentioned above.
```

Closes #16862

tests/data/DISABLED

@@ -63,6 +63,10 @@
 %if bearssl
 313
 %endif
+# Schannel does not support CRL file
+%if Schannel
+313
+%endif
 # Secure Transport does not support CRL file
 %if sectransp
 313