Improve error handling after error in PREPARE_GENOME:BLACKLIST_BEDTOOLS_INTERSECT

[H-Bell]

Description of feature

I experienced a problem where the pipeline fails first with PRESEQ_LCEXTRAP and then with NFCORE_CUTANDRUN:CUTANDRUN:MACS2_CALLPEAK_NOIGG or PREPARE_PEAKCALLING:UCSC_BEDGRAPHTOBIGWIG depending on configuration. This was caused by empty bam files after blacklist filtering which in turn was caused by an empty output from PREPARE_GENOME:BLACKLIST_BEDTOOLS_INTERSECT due to my genome fasta and blacklist bed having different chromosome labels (e.g. Chr1 vs. 1). My issue was fixed by changing to a fasta that matches the format of the blacklist, but could a test be introduced to identify this issue more intuitively? This may be an initial test of the formatting of the input files, or a test that the output from bedtools intersect is not empty?