Tooltip fixes (getLabelAndValue on null controller, null getParsed)

[joshkel]

I encountered #11315 under the following circumstances:

1. Position the cursor over the chart area, such that it causes a tooltip to be shown.
2. Move the cursor out of the chart area, such that the tooltip remains visible.
3. Cause the chart contents to be changed, such that the dataset referenced by the active tooltip element is no longer valid.
4. Move the mouse again. This triggers an inChartArea = false event, so it reuses the previous, now invalid, active elements.

This fixes #11315 under the circumstances for which I've reproduced it, but there may be others.

#11365 appears to be caused by a similar issue (reused active elements that reference now-invalid datasetIndexes of valid datasets), so I've addressed that too.

These issues appear to be caused by #9970 - that added logic to leave active elements alone on chart update, to accommodate cases where the user was programmatically maintaining the active elements themselves.

[mihai-peteu]

@etimberg May need to increase the max build size of chartjs, size-limit is failing at the moment:

 "name": "dist/chart.js",
    "passed": false,
    "size": 22408,
    "sizeLimit": 22400,

[etimberg]

yeah, @kurkle @LeeLenaleee what do you think about just removing that compressed size step? It seems to fail more often than not and we just slowly increase the size

[etimberg]

Will merge and override the CI for now then we can remove the step in a separate PR

[LeeLenaleee]

Also opend an issue for this once, we already thought about removing it before 😅
#11303

[mihai-peteu]

Does the Release action need to be manually run?

[etimberg]

yeah, releases are manual. We'll need to bump the package.json version first and then run the release on github.

[mihai-peteu]

Nice, I noticed the release-drafter was run. So next up is releasing a new patch version, then vue-chartjs can upgrade its dependency ;)

(cc @apertureless 🙏 )

[devtovn]

@joshkel hi you!
Current source don't check null value for [controller]

/src/plugins/plugin.tooltip.js

So, I get error at line 1188.

plugin.tooltip.js:1188  Uncaught TypeError: Cannot read properties of null (reading 'getParsed')
    at plugin.tooltip.js:1188:51

Please check committed source again.
Commit : 11596