Pinning contact request message leads to a crash

[churik]

After this the profile is not usable anymore.

Steps:

1. User A, B: restore or create multiaccount
2. User A: start 1-1 chat, send contact request
3. User B: accept CR
4. User B: pin message from CR

Expected result:
can pin contact message (works in nightly) or pinning is disabled for this message

Actual result:

OS: IOS, Android
Devices:
Logs:
status_logs.zip

Originally posted by @churik in #20082 (comment)

[churik]

cc @flexsurfer