Increase timeout for abc_p2p_fullblocktest

Summary:
This has been done in D9120 but apparently is not enough, maybe due to
D9232.

Test Plan:

../contrib/teamcity/build-configurations.py build-tsan

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D9284