set ResourceGroupName as optional for 'Set-AzSynapseSqlAuditSetting' (Azure#18983)

Author: yanjungao718

src/Synapse/Synapse/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 
 ## Upcoming Release
+* Set `ResourceGroupName` as optional for `Set-AzSynapseSqlAuditSetting` cmdlet
 * Added LastCommitId parameter to `New-AzureSynapseGitRepositoryConfig`
 * Fixed the issue that update spark pool version fail by `Update-AzSynapseSparkPool`
 

src/Synapse/Synapse/Commands/ManagementCommands/Auditing/SynapseSqlPoolAuditCmdlet.cs

@@ -109,6 +109,11 @@ protected override SqlPoolAuditModel GetEntity()
                 this.SqlPoolName = resourceIdentifier.ResourceName;
             }
 
+            if (string.IsNullOrEmpty(this.ResourceGroupName))
+            {
+                this.ResourceGroupName = this.SynapseAnalyticsClient.GetResourceGroupByWorkspaceName(this.WorkspaceName);
+            }
+
             SqlPoolAuditModel model = new SqlPoolAuditModel
             {
                 ResourceGroupName = ResourceGroupName,

src/Synapse/Synapse/Commands/ManagementCommands/Auditing/SynapseWorkspaceAuditCmdlet.cs

@@ -79,6 +79,11 @@ protected override ServerAuditModelType GetEntity()
                 this.WorkspaceName = resourceIdentifier.ResourceName;
             }
 
+            if (string.IsNullOrEmpty(this.ResourceGroupName))
+            {
+                this.ResourceGroupName = this.SynapseAnalyticsClient.GetResourceGroupByWorkspaceName(this.WorkspaceName);
+            }
+
             ServerAuditModelType model = new ServerAuditModelType()
             {
                 ResourceGroupName = ResourceGroupName,