tick/nohz: Rename the tick handlers to more self-explanatory names

The current names of the tick handlers don't tell much about what different
between them. Use names that better reflect their role and resolution.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230912104406.312185-2-frederic@kernel.org