fix: Remove stale colorbar ticks and titles after an orientation change

[nwiswell]

Description

Remove the tick labels and the title of the previous orientation when a colorbar changes orientation.

Closes #6973.

Changes

• drawAxis removes the tick label groups for the two axis letters before it draws the ticks
• drawTitle removes all other title classes of the colorbar, not only the class with the other h prefix

The colorbar axis id is x or y followed by opts._id, and the letter follows colorbar.orientation. The old cleanup selected only the classes for the current letter. Thus the elements of the previous orientation stayed, and positionCB included them in the colorbar size. On 3.x, the stale title width also inverted the axis domain of a short horizontal colorbar, and setScale threw.

Testing

• New jasmine test in colorbar_test.js: "removes tick labels and titles of the previous orientation". The test compares the colorbar text and the plot size after Plotly.react with a fresh Plotly.newPlot. The test fails on main without the fix.
• Suites that cover the change: colorbar, titles
• No baseline changes. The image mocks draw each colorbar in one orientation only.

Before (4.1.1) and after (this fix). The right panel is a fresh newPlot of the same figure.