Define USE_LATE_TASK_STATISTICS for AT32

[SteveCEvans]

AT32F435 has plenty of memory for this to be included.

[github-actions]

Do you want to test this code? Here you have an automated build:
Assets
WARNING: It may be unstable. Use only for testing! See: https://www.youtube.com/watch?v=I1uN9CN30gw for instructions for unified targets!

[blckmn]

AUTOMERGE: (FAIL)

• github identifies PR as mergeable -> FAIL
• assigned to a milestone -> PASS
• cooling off period lapsed -> PASS
• commit count less or equal to three -> PASS
• Don't merge label NOT found -> PASS
• at least one RN: label found -> PASS
• Tested label found -> FAIL
• assigned to an approver -> PASS
• approver count at least three -> FAIL

[KarateBrot]

We could also add it here to be target specific and not platform specific:
https://github.com/betaflight/betaflight/blob/master/src/main/target/AT32F435/target.h#L74

I'm unsure what the better approach would be. Technically this should be a target specific define as there are AT32 chips with little memory for sure but on the other hand we could just #undef USE_LATE_TASK_STATISTICS in AT32 targets which don't have a lot of memory (if any of them would get ported to BF in the future).