I integrated all test profiles into nf-test tests.

My attempt was the following:
(1) run all tests with nf-test test . --profile=+singularity --update-snapshot --clean-snapshot --verbose
(2) check snapshots, entries that deviated add to one of
(2a) tests/.nftignore (majority of files, when I assumed or experienced that md5sums varied was across several tests)
(2b) tests/.nftignore_files_entirely (file that occurred only sometimes or had variable names, e.g. that contained date/time or database files)
(2c) tests/*.nf.test param ignore: (~line 20) (when I assumed or experienced files with variable md5sums in only one/few tests)
(3) repeat (1) and (2) until there is no change any more

Notable mentions of (2b) are: busco downloads & database hmm & fasta files; ToulligQC output folders contain date & time, as well as NanoPlot log file.

I never checked why those files have unstable md5sums, potentially its worth checking in some cases.
I might have been a little overzealous with not checking file md5sums as in (2a), possible a few more fall into (2c). If there are some specific key files that do not vary (check beforehand!), those could be accommodated.

I think (experienced it, but didnt look more closely, i.e. I might be wrong) that dragonflye assembly is unstable (and therefore all downstream output), as well as Medaka output, but miniasm & Unicycler assemblies are stable. Potentially its worth looking into why and at what point those differ, maybe its possible to change a param or seed to make those results stable.

My plan is to run that tests here also at least 2 times to see if there is any more deviation.

PR checklist

• This comment contains a description of changes (with reason).
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