Sort and force grouping of includes (#4172)

This change enforces strict include grouping using IncludeCategories

In addition to adding this to the .clang-format file and applying it in the tests/src and src directories, I also did the following small changes:

    In ChatterSet.hpp, I changed lrucache to a <>include
    In Irc2.hpp, I change common/SignalVector.hpp to a "project-include"
    In AttachedWindow.cpp, NativeMessaging.cpp, WindowsHelper.hpp, BaseWindow.cpp, and StreamerMode.cpp, I disabled clang-format for the windows-includes
    In WindowDescriptors.hpp, I added the missing vector include. It was previously not needed because the include was handled by another file that was previously included first.
    clang-format minimum version has been bumped, so Ubuntu version used in the check-formatting job has been bumped to 22.04 (which is the latest LTS)

src/widgets/splits/SplitInput.cpp

@@ -12,22 +12,22 @@
 #include "util/Clamp.hpp"
 #include "util/Helpers.hpp"
 #include "util/LayoutCreator.hpp"
-#include "widgets/Notebook.hpp"
-#include "widgets/Scrollbar.hpp"
 #include "widgets/dialogs/EmotePopup.hpp"
 #include "widgets/helper/ChannelView.hpp"
 #include "widgets/helper/EffectLabel.hpp"
 #include "widgets/helper/ResizingTextEdit.hpp"
+#include "widgets/Notebook.hpp"
+#include "widgets/Scrollbar.hpp"
 #include "widgets/splits/InputCompletionPopup.hpp"
 #include "widgets/splits/Split.hpp"
 #include "widgets/splits/SplitContainer.hpp"
 #include "widgets/splits/SplitInput.hpp"
 
-#include <functional>
-
 #include <QCompleter>
 #include <QPainter>
 
+#include <functional>
+
 namespace chatterino {
 
 SplitInput::SplitInput(Split *_chatWidget, bool enableInlineReplying)