[material-ui][Button] Add target attribute to types

[KumarNitin19]

Fixes https://github.com/mui/material-ui/issues/41452

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[mui-bot]

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[KumarNitin19]

@KumarNitin19 I've tweaked the tests a bit, thanks for working on this!

@mj12albert Thanks!

[KumarNitin19]

I believe the fix here is wrong. The Material UI Button component extends from ButtonBase, which already inherits from native HTML button or a elements. And the a anchor element inherently include the target property.

@ZeeshanTamboli Yes you're right, I think It's a problem with component prop type.

[ZeeshanTamboli]

Since this PR is inactive, I am closing it.