Call goma_ctl.py ensure_start directly

Editor assessment

The subject states an action precisely, goma_ctl.py ensure_start is now called directly, but the word directly raises the obvious question of what indirection was removed and why it failed, and neither a body nor footers answer it. The build type fits CI tooling, no scope is needed, and the absent motivation leaves the reader guessing whether a wrapper broke, timed out, or misreported status. Hygiene is clean apart from terseness. The change is accurately described at the mechanism level while the reason for the restructuring stays undocumented.