This PR disables the `SCULPT_OT_sample_color` and `SCULPT_OT_set_pivot_position` operators and the following actions that correspond to them when attempting to operate on invisible objects:
* Set Pivot
* Sample Color
| Set Pivot | Sample Color |
| --- | --- |
|  |  |
### Limitations
* All of the operators invoked by a menu option do not indicate to the user that they are currently invalid or will not operate due to the mesh being invisible, potentially leading to a confusing user experience.
Addresses part of #112371
Pull Request: https://projects.blender.org/blender/blender/pulls/118306