[BUG]The specified 'SecondaryType' value was not returned

### API Spec link

https://github.com/Azure/azure-rest-api-specs/blob/e279afeeeee8feb7dae9d24e66095d2ce81791c6/specification/sql/resource-manager/Microsoft.Sql/stable/2023-08-01/FailoverGroups.json#L74

### API Spec version

2023-08-01

### Describe the bug

The [FailoverGroups_Get](https://github.com/Azure/azure-rest-api-specs/blob/e279afeeeee8feb7dae9d24e66095d2ce81791c6/specification/sql/resource-manager/Microsoft.Sql/stable/2023-08-01/FailoverGroups.json#L74) does not return the
[secondaryType ](https://github.com/Azure/azure-rest-api-specs/blob/e279afeeeee8feb7dae9d24e66095d2ce81791c6/specification/sql/resource-manager/Microsoft.Sql/stable/2023-08-01/FailoverGroups.json#L621)value, even when it is explicitly specified during the creation of the failover group.

### Expected behavior

The [FailoverGroups_Get](https://github.com/Azure/azure-rest-api-specs/blob/e279afeeeee8feb7dae9d24e66095d2ce81791c6/specification/sql/resource-manager/Microsoft.Sql/stable/2023-08-01/FailoverGroups.json#L74) should return specified secondaryType value.

### Actual behavior

No `secondaryType` value was returned.

### Reproduction Steps

Step1: Create a failover group specifying the `secondaryType`.
Step2: Call [FailoverGroups_Get](https://github.com/Azure/azure-rest-api-specs/blob/e279afeeeee8feb7dae9d24e66095d2ce81791c6/specification/sql/resource-manager/Microsoft.Sql/stable/2023-08-01/FailoverGroups.json#L74) and check if `secondaryType` is returned.

### Environment

_No response_

Read specification/sql/resource-manager/Microsoft.Sql/stable/2023-08-01/FailoverGroups.json, especially the FailoverGroups_Get operation near line 74 and secondaryType near line 621. Reproduce the create-and-get sequence described in the issue and compare the response with the specification; done means the specified secondaryType is returned or the discrepancy is resolved.

Written by the indexing model from the issue text.