use yaml constructors for _IgnoreCustomTagsLoader #3610

Job	Run time
pre-commit	15s
jsonschema	0s
core / Load tox environments	5s
core / Python 3.13 coverage	2m 33s
core / Python 3.12 coverage	2m 19s
core / Python 3.11 coverage	1m 57s
core / Python 3.10 coverage	2m 16s
core / Python 3.9 coverage	2m 9s
asdf-schemas / Load tox environments	7s
test / Load tox environments	7s
oldest / Load tox environments	8s
mocks3 / Load tox environments	10s
dev / Load tox environments	9s
compatibility / Load tox environments	8s
oldest / py39-oldestdeps-parallel (ubuntu-latest)	1m 8s
asdf-schemas / asdf-transform-schemas (ubuntu-latest)	1m 38s
asdf-schemas / asdf-standard (ubuntu-latest)	43s
compatibility / compatibility (ubuntu-latest)	3m 26s
test / py311-parallel (macos-latest)	57s
test / py311-parallel (windows-latest)	1m 55s
mocks3 / mocks3 (ubuntu-latest)	49s
dev / py311-devdeps-parallel (ubuntu-latest)	2m 21s
dev / py311-pytestdev-parallel (ubuntu-latest)	57s
dev / py310-devdeps-parallel (ubuntu-latest)	2m 24s
dev / py313-devdeps-parallel (ubuntu-latest)	2m 18s
dev / py312-devdeps-parallel (ubuntu-latest)	2m 17s
	33m 16s

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