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/.clang-format

@@ -27,7 +27,28 @@ IndentCaseLabels: true
 IndentWidth: 4
 IndentWrappedFunctionNames: true
 IndentPPDirectives: AfterHash
-IncludeBlocks: Preserve
+SortIncludes: CaseInsensitive
+IncludeBlocks: Regroup
+IncludeCategories:
+# Project includes
+  - Regex:  '^"[a-zA-Z\._-]+(/[a-zA-Z0-9\._-]+)*"$'
+    Priority: 1
+# Third party library includes
+  - Regex:  '<[[:alnum:].]+/[a-zA-Z0-9\._\/-]+>'
+    Priority: 3
+# Qt includes
+  - Regex:  '^<Q[a-zA-Z0-9\._\/-]+>$'
+    Priority: 3
+    CaseSensitive: true
+# LibCommuni includes
+  - Regex:  '^<Irc[a-zA-Z]+>$'
+    Priority: 3
+# Misc libraries
+  - Regex:  '^<[a-zA-Z_0-9]+\.h(pp)?>$'
+    Priority: 3
+# Standard library includes
+  - Regex:  '^<[a-zA-Z_]+>$'
+    Priority: 4
 NamespaceIndentation: Inner
 PointerBindsToType: false
 SpacesBeforeTrailingComments: 2