#12204 Add limit to auto rotate

[TheCrowd]

add targetAlpha to autoRotateBehavior to serve as a limit. When the limit is reached, the autoRotateBehavoir would stop.

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[RaananW]

Thank you so much for this PR!

There are a few comments I added. You also need to allow the user to disable this feature, so make sure the targetAlpha is not only a number, but optionally null (which should be the default value)

[azure-pipelines]

Please make sure to tag your PR with "bug", "new feature" or "breaking change" tags.

[azure-pipelines]

Please make sure to tag your PR with "bug", "new feature" or "breaking change" tags.

[azure-pipelines]

Snapshot stored with reference name:
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Test environment:
https://babylonsnapshots.z22.web.core.windows.net/refs/pull/12429/merge/index.html

To test a playground add it to the URL, for example:

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