add more stubs gatk4 #15455

Job	Run time
pytest-changes	7s
prettier	33s
nf-test-changes	35s
pre-commit	1m 21s
editorconfig	11s
pytest	0s
nf-core-lint-modules	0s
nf-core-lint-modules (gatk4/gatherpileupsummaries)	1m 54s
nf-core-lint-modules (gatk4/condensedepthevidence)	1m 18s
nf-core-lint-modules (gatk4/fastqtosam)	1m 11s
nf-test (modules/nf-core/gatk4/gatherpileupsummaries, conda)	5m 4s
nf-test (modules/nf-core/gatk4/gatherpileupsummaries, docker_self_hosted)	1m 20s
nf-test (modules/nf-core/gatk4/gatherpileupsummaries, singularity)	1m 25s
nf-test (modules/nf-core/gatk4/condensedepthevidence, conda)	5m 2s
nf-test (modules/nf-core/gatk4/condensedepthevidence, docker_self_hosted)	1m 23s
nf-test (modules/nf-core/gatk4/condensedepthevidence, singularity)	2m 48s
nf-test (modules/nf-core/gatk4/fastqtosam, conda)	5m 55s
nf-test (modules/nf-core/gatk4/fastqtosam, docker_self_hosted)	5m 12s
nf-test (modules/nf-core/gatk4/fastqtosam, singularity)	3m 23s
confirm-pass	1s
	38m 43s

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