Disable ZeroDateTime tests for Azure MySQL.

Its behaviour may have recently changed with an update to 8.0.28.

Author: bgrainger

azure-pipelines.yml

@@ -128,7 +128,7 @@ jobs:
       arguments: '-c Release -f net6.0 --no-restore'
       testRunTitle: ${{ format('{0}, $(Agent.OS), {1}, {2}', 'Azure', 'net6.0', 'SSL') }}
     env:
-      DATA__UNSUPPORTEDFEATURES: 'CachingSha2Password,Ed25519,GlobalLog,KnownCertificateAuthority,QueryAttributes,RsaEncryption,Sha256Password,Timeout,Tls11,Tls13,UnixDomainSocket'
+      DATA__UNSUPPORTEDFEATURES: 'CachingSha2Password,Ed25519,GlobalLog,KnownCertificateAuthority,QueryAttributes,RsaEncryption,Sha256Password,Timeout,Tls11,Tls13,UnixDomainSocket,ZeroDateTime'
       DATA__CONNECTIONSTRING: "$(AzureConnectionString);database=mysqltest;ssl mode=Required;DefaultCommandTimeout=3600;AllowPublicKeyRetrieval=True"
 
 - job: windows_integration_tests_1