Consider dropping webkit2gtk

Description:

Consider dropping webkit2gtk after moving all dependent packages to webkit2gtk-4.1 as the first step to libsoup's removal.

Related merge requests / issues:

• atril!1 (merged)
• bookworm!1
• gambas3!1 (merged)
• gnucash!2 (merged)
• gufw!2 (closed)
• liferea wait for 1.16 release currently on release candidate 3.
• lightdm-webkit2-greeter!1 (merged)
• notes-up#1 (closed) FTBFS / unmaintained upstream
• rednotebook!2 (merged)
• spicy-launcher#1 FTBFS
• sugar update to 0.121 or drop as unmaintained upstream
• sugar-activity-browse update to 208 or drop as unmaintained
• sugar-activity-read sugar-activity-read!1 (closed)
• gpodder next release or cherry-pick
• quodlibet!1 (merged)
• sugar-toolkit-gtk3!2 (merged)
• telegram-desktop supports both webkit2gtk and webkit2gtk-4.1 via dlopen drop dependencies on webkit2gtk
• dexed!1 (merged)
• elephantdsp-roomreverb!1 (merged)
• gambas3!1 (merged)
• juce!1 (merged)
• odin2-synthesizer!1 (merged)
• python-wxpython#3 (closed) FTBFS
• sg-323!1 (merged)
• surge-xt!1 (merged)
• wxsvg!1 (merged)