Add documentation-related sources to `helm_chart` #22199

Job	Run time
Classify changes	4s
Ensure PR has a category label	3s
Bootstrap Pants, test Rust (macOS11-x86_64)	3m 41s
Bootstrap Pants, test and lint Rust (Linux-x86_64)	2m 0s
Bootstrap Pants, test Rust (Linux-ARM64)	2m 1s
Build wheels (Linux-ARM64)	0s
Build wheels (Linux-x86_64)	0s
Build wheels (macOS10-15-x86_64)	0s
Build wheels (macOS11-ARM64)	0s
Test Python (Linux-x86_64) Shard 1/10	8m 28s
Lint Python and Shell	3m 6s
Test Python (Linux-x86_64) Shard 2/10	10m 39s
Test Python (Linux-x86_64) Shard 3/10	8m 56s
Test Python (Linux-x86_64) Shard 0/10	8m 22s
Test Python (Linux-x86_64) Shard 4/10	17m 44s
Test Python (Linux-x86_64) Shard 5/10	7m 17s
Test Python (Linux-x86_64) Shard 6/10	3m 11s
Test Python (Linux-x86_64) Shard 7/10	6m 20s
Test Python (Linux-x86_64) Shard 8/10	6m 13s
Test Python (Linux-x86_64) Shard 9/10	6m 16s
Test Python (Linux-ARM64)	3m 8s
Test Python (macOS11-x86_64)	11m 22s
Set Merge OK	1s
Merge OK	1s
	1h 48m 53s

Provide feedback