Fix length validation for palette in the stage library bindings

[deshipu]

Right now it's impossible to use the Stage library, because it always throws a validation error.

[dhalbert]

This is against main, but my understanding is that it's also broken in 10.1.x. Should it be backported to that, or the base changed on this PR?

There aren't any other 10.1.x changes pending right now.

[deshipu]

It would be great if it could be backported. I'm not entirely familiar withe the process, so I don't know what is the difference.

[dhalbert]

If you made a PR against 10.1.x instead of main, then it would go into the next 10.1.x release, and we'd also forward-port it to main, just by merging 10.1.x into main.

It's possible to change the base for the PR by clicking Edit on the title, but that often doesn't work if there are other changes.

[deshipu]

I changed the base, it seems to have worked.

[dhalbert]

Changing the base brought in all the changes to main (>300 changed files), so that didn't work. I changed it back. You could make a new PR using a new branch off of 10.1.x, or we can just merge this and then cherry-pick the change from this PR into another PR against 10.1.x.

[deshipu]

I made a second pull request against 10.1.x here: #10909

I wouldn't mind if both of them were merged, so I'm not closing this one.

[dhalbert]

Thanks for catching this!