[Enhancement]:Add test cases to test the meta info like index and load state

[zhuwenxing]

What would you like to be added?

Add test cases to test the meta info like index and load state

Why is this needed?

The backup tool now support backup index and load state mate info, so this feature need to be tested

Anything else?

No response

[zhuwenxing]

/assign @zhuwenxing

[wayblink]

FYI, index info tests should cover vector field and varchar field

[wayblink]

FYI, index info tests should cover vector field and varchar field

New findings, gosdk currently doesn't support get and create scalar field index. scalar field index will be supported after gosdk support it