Reactos

[EXT2FS] Align with upstream and mark ReactOS diff (#5245) master

NOTE: There are no new features in this PR, we stay with upstream version 0.69. CORE-18645 - Add ifdefs to distinguish ReactOS code/fixes from the upstream code; - If upstream code was overriden, reintroduce it in #else section; - Re-align .rc version info with upstream (0.69).