Ninja: Clean metadata when re-generating inside a build with Ninja 1.10.2+
Ninja 1.10.2 fixes support for generator = 1
rules that run metadata update commands during regeneration while a build is running. Update
the condition added by commit ccaa0bcc from !4290 (merged) to remove our workaround when Ninja is new enough.
Fixes: #20274 (closed)
Backport: release
Edited by Brad King