[GR-62143] Preserve all fields in the preserve mode.

[graalvmbot]

This PR:

1. Enables field registration for -H:Preserve=.
2. Omits registration of method of super classes as they are anyhow traversed in -H:Preserve=.
3. Sorts classes ascending from the deepest in the class hierarchy so fields of subtypes don't have to be traversed at all.

On "Hello, World!" before this PR:

[2/8] Performing analysis...  [*****]                                                                   (24.7s @ 8.72GB)

and after

[2/8] Performing analysis...  [*****]                                                                   (29.4s @ 5.25GB)