Update configs to use object types #8890
Description
With support for object types added, several configs should be converted from strings to objects:
- fileExtension.fileExplorer.columnData
- tableExtension.tableExplorer.columnData
- managedDisksExtension.managedDisksExplorer.columnData
- queueExtension.queueExplorer.columnData
- blobExtension.blobContainerExplorer.columnData
- blobExtension.blobExplorer.columnData