uses wildcard in az pipelines variable-group list --group-name causes weird behavior

### Describe the bug

if i run `az pipelines variable-group list --group-name dev*` such that `group-name` uses wildcard `*` then these fields are null but they should not be null.

````
"name": "dev-docker",
"modifiedBy": {
........
"displayName": null,
"uniqueName": null,
.......
},

"name": "dev",
"modifiedBy": {
........
"displayName": fname lname,
"uniqueName": name@email.com,
.......
},
````
if i run `az pipelines variable-group list --group-name dev-docker` such that `group-name` specifies actual group name `dev-docker` then these fields have their value displayed.

````
"modifiedBy": {
........
"displayName": john smith,
"uniqueName": jsmith@email.com,
.......
},
````
### Related command

az pipelines variable-group list

### Errors

no error but values are not displayed when they should have values.

### Issue script & Debug output
````
"name": "dev-docker",
"modifiedBy": {
........
"displayName": null,
"uniqueName": null,
.......
},

"name": "dev",
"modifiedBy": {
........
"displayName": fname lname,
"uniqueName": name@email.com,
.......
},
````
### Expected behavior

they should be displayed.

### Environment Summary

azure cli 2.50.1

### Additional context

_No response_