Add nf-test to metaphlan #13862

Job	Run time
pre-commit	12s
prettier	55s
nf-test-changes	39s
editorconfig	11s
pytest-changes	8s
pytest	0s
nf-core-lint-modules (fastq_taxonomic_profile_metaphlan)	51s
nf-core-lint-modules (metaphlan/mergemetaphlantables)	1m 21s
nf-core-lint-modules (metaphlan/metaphlan)	1m 18s
nf-test (subworkflows/nf-core/fastq_taxonomic_profile_metaphlan, conda)	8m 43s
nf-test (subworkflows/nf-core/fastq_taxonomic_profile_metaphlan, docker_self_hosted)	5m 47s
nf-test (subworkflows/nf-core/fastq_taxonomic_profile_metaphlan, singularity)	9m 53s
nf-test (modules/nf-core/metaphlan/mergemetaphlantables, conda)	12m 24s
nf-test (modules/nf-core/metaphlan/mergemetaphlantables, docker_self_hosted)	1m 17s
nf-test (modules/nf-core/metaphlan/mergemetaphlantables, singularity)	6m 16s
nf-test (modules/nf-core/metaphlan/metaphlan, conda)	12m 52s
nf-test (modules/nf-core/metaphlan/metaphlan, docker_self_hosted)	1m 44s
nf-test (modules/nf-core/metaphlan/metaphlan, singularity)	7m 59s
confirm-pass	1s
	1h 12m 31s

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