Description of changes:

s2n_security_policies_test is taking a long time to run (~30 seconds on my machine). This is because this file contains a test which expects s2n_negotiate to return an error, but does not disable blinding for this error:

This PR disables blinding in s2n_test_security_policies_compatible_for_policy, to allow it be properly used for tests that return errors protected by connection blinding.

Call-outs:

Ideally we'd have a way to catch issues like this before they're merged: #5557

Testing:

Test duration before change:

❯ ctest --test-dir build -R s2n_security_policies_test
Test project /Users/vclarksa/w/s2n-tls-fork/build
    Start 184: s2n_security_policies_test
1/1 Test #184: s2n_security_policies_test .......   Passed   29.98 sec

100% tests passed, 0 tests failed out of 1

Label Time Summary:
unit    =  29.98 sec*proc (1 test)

Test duration after change:

❯ ctest --test-dir build -R s2n_security_policies_test
Test project /Users/vclarksa/w/s2n-tls-fork/build
    Start 184: s2n_security_policies_test
1/1 Test #184: s2n_security_policies_test .......   Passed    2.13 sec

100% tests passed, 0 tests failed out of 1

Label Time Summary:
unit    =   2.13 sec*proc (1 test)

Total Test time (real) =   2.14 sec

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.