Fix some remaining consistency issues for selection shortcuts for both
left and right click select.
Based on design of #105298
Grease Pencil:
Instead of using `Alt Select` shortcuts for selecting whole strokes,
these are now following existing standards with `L` and `Shift L` from
select linked pick operations.
`Alt Select` keys are instead used for selecting individual components
in modes that use brushes just like [0].
Regular selection like `Select` and `Shift Select` are now always mapped
to ensure that all keymap configurations are able to select individual
components in every mode.
This does not cause conflicting behavior with brushes.
Lasso Select shortcuts on `Ctrl Alt` and `Shift Ctrl Alt` have been
removed. These were duplicates and are not needed.
Mesh Sculpt Mode:
Mesh sculpt mode uses correct lasso masking shortcuts in both right and
left click select. These are now the same as lasso selection shortcuts
in other modes.
Ref !110960.
[0]: fb54d3f865
920271da42