Decouple updating timings from automated commit pipeline
Summary: See title.
Test Plan:
COMMIT_TYPE=dummy ./automated-commits.sh -p HEAD ./patch-recipes/update-timings.sh git show # verify timings are updated
Reviewers: #bitcoin_abc, deadalnix
Reviewed By: #bitcoin_abc, deadalnix
Differential Revision: https://reviews.bitcoinabc.org/D7504