and raster layer properties Temporal tabs

...and add a nice explicit explanatory tooltip.

In cases where we have extra time-related settings on these pages
which AREN'T related to how the layer interacts with the temporal
controller, we need to make it super-clear and explicit exactly
what checking the "Temporal" check box means!

The new wording was designed to cover all the different effects
that checking this option has, including meaning that it's controlled
by the Temporal Controller Dock, but also that it will be affected
by temporal ranges set on layout map items and temporal ranges
set when exporting the canvas as a image.