* Update Puppeteer to 8.0.0
Updates Chromium to r856583
Links to new build of Linux headless_shell in the Kibana team GCS bucket
Links to main download site of Chromium for Mac and Windows
Removes Mac and Windows compatibility from the Chromium build scripts
* add functional tests for large dashboard
* ensure png comparison is working
* add test for large dashboard pdf
* update arm64 binary checksum
* update README
* more readme update
* Update x-pack/build_chromium/README.md
Co-authored-by: Jean-Louis Leysens <jloleysens@gmail.com>
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Jean-Louis Leysens <jloleysens@gmail.com>