Don't munge types in Docker registry config values. #24597

Job	Run time
Classify changes	4s
Bootstrap Pants, test and lint Rust (Linux-x86_64)	1m 59s
Bootstrap Pants, test Rust (Linux-ARM64)	1m 34s
Bootstrap Pants, test Rust (macOS12-x86_64)	3m 29s
Build wheels (Linux-ARM64)	0s
Ensure PR has release notes	3s
Build wheels (Linux-x86_64)	0s
Build wheels (macOS11-ARM64)	0s
Build wheels (macOS10-15-x86_64)	0s
Test Python (Linux-ARM64)	7m 57s
Test Python (Linux-x86_64) Shard 1/10	7m 54s
Test Python (Linux-x86_64) Shard 2/10	11m 48s
Lint Python and Shell	3m 11s
Test Python (Linux-x86_64) Shard 0/10	9m 28s
Test Python (Linux-x86_64) Shard 3/10	8m 17s
Test Python (Linux-x86_64) Shard 4/10	18m 45s
Test Python (Linux-x86_64) Shard 5/10	7m 39s
Test Python (Linux-x86_64) Shard 8/10	6m 44s
Test Python (Linux-x86_64) Shard 6/10	3m 13s
Test Python (Linux-x86_64) Shard 7/10	6m 43s
Test Python (Linux-x86_64) Shard 9/10	7m 16s
Test Python (macOS12-x86_64)	12m 49s
Set Merge OK	1s
Merge OK	1s
	1h 58m 55s

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