[WIP] upgrade to mediawiki 1.32

[mattwr18]

1. change mediawiki version to 1.32 in the Dockerfile
2. update extensions being installed in the the Dockerfile (issues with having the right url, need to manually go to the extensions site and copy the install link to the Dockerfile)
3. update .gitmodules to point to branch 1_32 of VisualEditor
4. Extract EmbedVideo, WikiSEO to be installed by composer
5. Remove ExtraLanguagesLink extension as it has never worked for us
   Commit 833cb17
   Pushed up and VisualEditor didn't work... it seems like it starts to open, but then it quickly closes the progress bar
6. Update Visual Editor to new commit
   Commit 9d51636
   Pushed up with no changes
7. Extract all extensions to an install-extensions script to install them following the instructions on the extensions' pages eg https://www.mediawiki.org/wiki/Extension:VisualEditor
   Commit b162cd9
   Pushed up with no changes
8. Version VisualEditor, as the one being installed in the above step was from master, which is pointing to 1.33
   Commit f8937fd
   Pushed up with no changes
9. Move VisualEditor install back to the Dockerfile
   Committ 959e221
   Pushed up with no changes
10. Try with VisualEditor 1_31
    Committ 5456a9a
    Pushed up with no changes
11. Add VE as a submodule again
    Commit 906fd88
    Pushed up with no changes
12. Move VE install back to install script
    Commit aa873da
    Pushed up with no changes

Decide to make less changes to other extensions in another branch see 69-upgrade-attempt2-to-mediawiki-1.32

[tansaku]

thanks for documenting @mattwr18 - much appreciated :-)