Kernel: Split the Ext2FileSystem.{cpp,h} files into smaller components

Author: https://github.com/supercomputer7
Commit: 3cc0d60141
Pull-request: https://github.com/SerenityOS/serenity/pull/15771
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/bgianfo

Meta/lint-clang-format.sh

@@ -11,7 +11,7 @@ if [ "$#" -eq "1" ]; then
             '*.cpp' \
             '*.h' \
             ':!:Base' \
-            ':!:Kernel/FileSystem/ext2_fs.h' \
+            ':!:Kernel/FileSystem/Ext2FS/Definitions.h' \
             ':!:Userland/Libraries/LibCodeComprehension/Cpp/Tests/*' \
             ':!:Userland/Libraries/LibCpp/Tests/parser/*' \
             ':!:Userland/Libraries/LibCpp/Tests/preprocessor/*'