The patches from the upstream fork were outdated and did not actually
work for version 2023.06.1+524.

* patches/rstudio-server-multi-version: Update patches from upstream.
* guix-science/packages/rstudio.scm (rstudio-server-multi-version)
[source]: Replace patches.
[arguments]: Add phase 'patch-gwt-build.
[native-inputs]: Add python-wrapper and python-lxml.

Replace the patches with newer versions suitable for version
2023.06.1+524 of rstudio-server.

* patches/rstudio-server-multi-version/0001-handleClientInit-Store-R-versions-in-sessionInfo.patch,
patches/rstudio-server-multi-version/0002-sessionProcessConfig-Configure-R-version-from-active.patch,
patches/rstudio-server-multi-version/0003-NewProjectWizard-Unhide-version-selector-widget.patch,
patches/rstudio-server-multi-version/0004-handleConnection-Switch-R-version-when-switching-pro.patch,
patches/rstudio-server-multi-version/0005-Add-version-switcher-widget-to-toolbar.patch,
patches/rstudio-server-multi-version/0006-Look-at-.local-share-rstudio-r-versions-for-custom-R.patch,
patches/rstudio-server-multi-version/0007-detectRLocationsUsingR-Restore-R_HOME-at-the-end.patch: Replace.

The changes have been rebased on top of version 1.4.1717 and include a
bug fix.  Previous versions would fail to look up the user's active
sessions (and thus fail to restore a previously set version of R) when
rserver did not run as the same user account as the rsession
process (e.g. root).

* guix-science/packages/rstudio.scm (rstudio-server-multi-version):
New variable.
*
patches/rstudio-server-multi-version/0001-handleClientInit-Store-R-versions-in-sessionInfo.patch,
patches/rstudio-server-multi-version/0002-sessionProcessConfig-Configure-R-version-from-active.patch,
patches/rstudio-server-multi-version/0003-NewProjectWizard-Unhide-version-selector-widget.patch,
patches/rstudio-server-multi-version/0004-handleConnection-Switch-R-version-when-switching-pro.patch,
patches/rstudio-server-multi-version/0005-Add-version-switcher-widget-to-toolbar.patch,
patches/rstudio-server-multi-version/0006-Look-at-.local-share-rstudio-r-versions-for-custom-R.patch,
patches/rstudio-server-multi-version/0007-detectRLocationsUsingR-Restore-R_HOME-at-the-end.patch:
New files.