XWIKI-22222: Add the concept of "request effective author"
* Update since version.

(cherry picked from commit 8fe327b5)

* Add more unit tests.

(cherry picked from commit d3c526ea)

* Use proper package name
* Improve code and comment.

(cherry picked from commit ba533945)

* Use XWikiToStringBuilder

(cherry picked from commit 2f8d7927)

* Make the request effective author optional (while keeping the event listener that sets it to the currently authenticated user by default)

(cherry picked from commit 6510f9da)

(cherry picked from commit 26921c18)

(cherry picked from commit a69bc0ca)

(cherry picked from commit 0c634cdf)

* Click on the left of the heading to avoid clicking on the date picker
  popup.

(cherry picked from commit aaaa0bff)

(cherry picked from commit fc3af6f4)

Co-authored-by: Manuel Leduc <manuel.leduc@xwiki.com>

(cherry picked from commit 2145c9a2)

Co-authored-by: Gankov Andrey <gav@qsolution.ru>
Co-authored-by: LucasC <lucas.charpentier@xwiki.com>
Co-authored-by: Mariana Batista <mariana-batista99@hotmail.com>
Co-authored-by: Michael Hamann <michael.hamann@xwiki.com>
Co-authored-by: Nikita Petrenko <petrenkonikserg@gmail.com>
Co-authored-by: Simon Urli <simon.urli@xwiki.com>
Co-authored-by: Simpel <git@simpel.cc>
Co-authored-by: Thomas Mortagne <thomas.mortagne@gmail.com>
Co-authored-by: Ümit Solmaz <solmazumit1@yandex.com>

XWIKI-21687: LoginIT.loginLogoutAsAdmin(TestUtils, TestReference) and LoginIT.loginWithInvalidCredentials(LogCaptureConfiguration) are flickering

* Use the same condition for `isVisible` as for the waiting when
  opening/closing the drawer. This ensures that if you call `isVisible`
  after opening/closing the drawer, you get the expected result.
* Wait for the x-position of the drawer to be stable when opening the
  drawer to ensure that the opening animation is finished.

(cherry picked from commit ce176320)

(cherry picked from commit 00096e66)

* Update test.

(cherry picked from commit ad051b7a)

XWIKI-22030: Improve escaping in XWiki.XWikiSyntaxMacrosList
(cherry picked from commit c3125d16)
(cherry picked from commit e93d2dc8)

XWIKI-20651: Pt_br (Pt_br) and Zh_tw (Zh_Tw) languages displayed in drop-downs which cause many "Invalid locale" warnings if selected

  * Fix bad API calls in integration test

(cherry picked from commit bcbe4796)

XWIKI-20651: Pt_br (Pt_br) and Zh_tw (Zh_Tw) languages displayed in drop-downs which cause many "Invalid locale" warnings if selected

  * Improve dateFormat test to force the timezone so that it covers this
    and don't fail on CI because of bad offset

(cherry picked from commit 3203d264)

XWIKI-20651: Pt_br (Pt_br) and Zh_tw (Zh_Tw) languages displayed in drop-downs which cause many "Invalid locale" warnings if selected

  * Fix bad API calls in tests

(cherry picked from commit b6948032)

XWIKI-20651: Pt_br (Pt_br) and Zh_tw (Zh_Tw) languages displayed in drop-downs which cause many "Invalid locale" warnings if selected

  * Fix LocalizationScriptService#getAvailableLocales to not use
    Locale(String) constructor but to rely instead on
LocaleUtils.toLocale
  * Fix the same mistake in other parts of XWiki

(cherry picked from commit 42edb78c)

(cherry picked from commit e40e37ff)

* Updated the default (english) hint to make it easier to use this feature

(cherry picked from commit ea740a9c)

* Fix bad version from cherry-pick

XWIKI-21625: You shouldn't have to force the page lock to enter a realtime editing session
(cherry picked from commit 9127847a)

  * Ensure that an edition failure won't block other test because of the
    alert when leaving edition

(cherry picked from commit 3795d1b5)

XWIKI-21687: LoginIT.loginLogoutAsAdmin(TestUtils, TestReference) and LoginIT.loginWithInvalidCredentials(LogCaptureConfiguration) are flickering

(cherry picked from commit 0ddc451a)

* Use 100dvh as height instead of 100vh to make sure that the drawer is
  fully visible when the viewport is resized, e.g., due to the
  navigation bar. Use 100vh as fallback as dvh is still relatively new.

(cherry picked from commit 3aa2f06a)

(cherry picked from commit 27b7b2e2)

(cherry picked from commit f5e07d8a)

(cherry picked from commit 1597139d)

  * Fix minor issue with integration test

(cherry picked from commit 2082368a)