[NTOSKRNL] When growing a file, invalid the last VACB so that it can be refreshed

[NTOSKRNL] When growing a file, invalid the last VACB so that it can be refreshed

This will avoid corruption when a file size is little grown and read afterwards.
Up to now, FSD where reading 0es instead of expected data, causing corruption.

This fixes MS FastFAT not being able to mount a FAT volume in ReactOS, corrupting
the FAT.
This also fixes the CcSetFileSizes kmtest tests.

This is based on a patch by Thomas Faber.

CORE-11819