[CI] Fix the check source control tools build

Summary:
The arcanist version packaged in debian 12 is buggy with php 8, so let's use the phorge one.
Also fixes a warning by explicitely setting the default branch name to master.

Test Plan: Build the container and run the build.

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D17031