Update fastq_align_star for nf-test and handle transcriptome alignment better

[pinin4fjords]

In this PR:

• Update fastq_align_star for nf-test
• Replace test data with RNA-seq data used by STAR module, that will actually align (test data used previously was not aligning).
• Add analagous sorting, indexing etc for the transcriptome BAM that can be produced by STAR.
• Supply a trancriptome fasta file that can be used by samtools stats

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
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[mashehu]

sorry, the last review wasn't supposed to be an approval, but a request for comments

[pinin4fjords]

thanks @mashehu !