This PR migrates the existing `PAINT_OT_hide_show` operator to the
previously extracted `gesture` namespace performed in #118881
The current operator has support for choosing whether the hide / show
action is performed on every vertex inside or outside the selection
area. This has been added to the common gesture functionality too,
but no common operator property has been exposed for it for the other
Lasso / Box tools to use.
Other modes of the current "hide_show" operator have been split
into separate operators: `PAINT_OT_hide_show_all` and
`PAINT_OT_hide_show_masked`.
Prerequisite for #80390
Pull Request: https://projects.blender.org/blender/blender/pulls/119040
Sean Kim
705964d7bb