Spider actions are harcoded in the Spider plot instead of available in the various actions

[cjolif]

In particular Spider plot is not leveraging action2d/Tooltip but hard code its own tooltip.

This should be refactored so that actions are not hardcoded into plot2d/Spider but available through actions.

[cjolif]

In [30157]:

refs #16463. Refactor spider plot tooltip, highlight & magnify out of spider plot into the corresponding actions + other small cleanups.

[bill]

In [30238]:

Fix doc comment syntax error which was breaking the doc parser. Refs #16463.