use a dedicated render thread for indicatif spinner #28875

Job	Run time
Classify changes	28s
Bootstrap Pants, test and lint Rust (Linux-x86_64)	20m 28s
Bootstrap Pants, test Rust (macOS14-ARM64)	9m 19s
Test in-progress Windows support	4m 32s
Bootstrap Pants, test Rust (Linux-ARM64)	19m 35s
Ensure PR has release notes	23s
Build wheels (Linux-ARM64)	0s
Build wheels (macOS14-ARM64)	-1s
Build wheels (Linux-x86_64)	-1s
Test Python (Linux-ARM64)	13m 43s
Test Python (Linux-x86_64) Shard 3/10	12m 18s
Test Python (Linux-x86_64) Shard 2/10	9m 6s
Test Python (Linux-x86_64) Shard 1/10	12m 16s
Test Python (Linux-x86_64) Shard 0/10	12m 37s
Lint Python and Shell	2m 59s
Test Python (Linux-x86_64) Shard 5/10	9m 34s
Test Python (Linux-x86_64) Shard 8/10	14m 43s
Test Python (Linux-x86_64) Shard 7/10	15m 27s
Test Python (Linux-x86_64) Shard 9/10	9m 41s
Test Python (Linux-x86_64) Shard 6/10	8m 48s
Test Python (Linux-x86_64) Shard 4/10	16m 37s
Test Python (macOS14-ARM64)	8m 21s
Coveralls Done	25s
Set Merge OK	22s
Merge OK	22s
	3h 22m 2s

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