RFR: 8303130: Document required Accessibility permissions on macOS

[Dmitry Markov]

On Mon, 27 Feb 2023 15:54:28 GMT, Dmitry Markov <dmarkov at openjdk.org> wrote:

> Added the section devoted to client UI test which use Robot API

@aivanov-jdk @mrserb Thanks for review. I have updated the text based on your suggestions. Please have a look at the new version.

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PR: https://git.openjdk.org/jdk/pull/12772