Use minified docker images

use images based on Dockerfiles generated with the following external PRs:

• https://github.com/zavolanlab/Dockerfiles/pull/63
• https://github.com/zavolanlab/Dockerfiles/pull/64
• https://git.scicore.unibas.ch/zavolan_group/tools/tin_score_calculation/merge_requests/5
• https://git.scicore.unibas.ch/zavolan_group/tools/gtf_transcript_type_to_bed12/merge_requests/2

workflow now uses the following images:

• zavolab/cutadapt:1.16-slim
• zavolab/fastqc:0.11.9-slim (bumped from 0.11.8)
• zavolab/gtf_transcript_type_to_bed12:0.1.0-slim
• zavolab/kallisto:0.46.1-slim
• zavolab/salmon:1.1.0-slim (bumped from 0.11.0)
• zavolab/samtools:1.10-slim (bumped from 1.8)
• zavolab/star:2.7.3a-slim (bumped from 2.6.0a)
• zavolab/tin_score_calculation:0.1.0-slim

Total compressed size of images reduced from 2153.03 MB to 560.93 MB (3.8x smaller)

Closes #67 (closed)