SNOW-2408964: support custom_schema when reading xml #20740

Job	Run time
Check linting	2m 47s
Type Checking	31s
Build Doc	1m 58s
Build Wheel File	20s
Test AST Encoding py-ubuntu-latest-3.11-aws	2m 30s
Test Local Testing Module py-ubuntu-latest-3.13	6m 50s
Doctest AST (phase0) py-macos-latest-3.9	23m 22s
Test AST enabled (phase0) py-ubuntu-latest-3.13	2h 8m 51s
Test modin extra without pandas extra py-macos-3.9-aws.	1m 56s
Test modin-macos-latest-3.9-aws	31m 57s
Test modin-windows-latest-64-cores-3.11-gcp	30m 48s
Test modin-ubuntu-latest-64-cores-3.12-aws	27m 2s
Test py-macos-latest-3.12-azure	25m 48s
Test py-ubuntu-latest-64-cores-3.12-azure	17m 26s
Test modin-ubuntu-latest-64-cores-3.10-azure	27m 0s
Test py-ubuntu-latest-64-cores-3.12-gcp	15m 43s
Test py-ubuntu-latest-64-cores-3.9-aws	18m 5s
Test py-ubuntu-latest-64-cores-3.13-aws	16m 45s
Test py-windows-latest-64-cores-3.13-gcp	18m 16s
Combine coverage	1m 24s
	6h 39m 19s

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