Changing the cDNA fasta should not trigger rerun of hisat2 branch

[alexg9010]

After finishing a pipeline run I wanted to change the cDNA file to trigger a rerun of salmon, but this also triggered a restart of Hisat because of the rule check_annotation_files. Given that the cDNA is not relevant for Hisat2 mapping I propose a more fine-grained solution that separately checks GTF vs DNA and GTF vs cDNA.

For now, I can circumvent the rerun by using:

 pigx-rnaseq -s settings_editted.yaml sample_sheet_merged_replicates.csv --target={deseq_report_salmon_transcripts,deseq_report_salmon_genes}