Add support for Snakemake latch develop for JIT step

[rahuldesai1]

Flow for using latch develop with Snakemake:
latch register . --snakefile ...
latch develop . --snakemake ...
python3 <user defined test file> (see example below)

from snakemake_jit_entrypoint import snakemake_gia_jit_register_task

snakemake_gia_jit_register_task(
    adapter_r1="AGATCGGAAGAGCACACGTCTGAACTCCAGTCAC",
    adapter_r2="CTGTCTCTTATACACATCTGACGCTGCCGACGA",
    genome_dir="latch://24030.account/uditas-inputs/test-inputs/references",
    demuxed_fastq_dir="latch://24030.account/uditas-inputs/test-inputs/human_sample/post-demultiplexed",
    donor_map_dir="latch://24030.account/uditas-inputs/test-inputs/human_sample/donor_map",
    manifest="latch://24030.account/uditas-inputs/test-inputs/human_sample/metadata.tsv",
    read_structure="8B+T 8B+T",
    has_tn5_umis=True,
    dry_run=True,
)

This will run the JIT step, and upload the resulting entrypoint file without starting the execution.

[ayushkamat]

big thing is not adding a dry_run parameter, use env variable instead

everything else is minor