These were added under the theory that abandoned thread-heap pages needed
collecting by hand. The TLS detach callback now releases each thread's heap
properly, so an explicit mi_collect at every job and connection exit buys
nothing and adds allocator teardown work on paths that were crashing a parallel
Windows ARM64 shard (daemon_application, test-par exit 2 with the suite summary
otherwise clean).
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>