[CI] Fix missing parameters transfer from ibd.sh to bitcoind

Summary:
The ibd.sh script is expected to transfer its arguments to bitcoind.
This allow to set the assumevalid and checkpoints options as needed.

Test Plan:

./contrib/teamcity/ibd.sh -assumevalid=0 -checkpoints=0

Check in the output that bitcoind is started with these arguments.

Reviewers: #bitcoin_abc, deadalnix, Fabien, nakihito

Reviewed By: #bitcoin_abc, nakihito

Differential Revision: https://reviews.bitcoinabc.org/D4061