48 fix fast5 errors with guppy and dorado

[jonperdomo]

Fix errors when running dorado-generated FAST5 files and large guppy FAST5 inputs.

[jonperdomo]

The error with dorado-generated fast5 files was due not handling when a multi-read fast5 file does not have the FASTQ sequence data. Although the test file does only have a single read, it is in the multi-read FAST5 format (https://github.com/nanoporetech/dorado/blob/master/tests/data/fast5/single_read.fast5). When you attempt to access the 'ReadID/Analyses' group, the H5 error was not handled. It is fixed now, generating signal plots even when no sequence data is available (same as when running a single-read fast5).

[jonperdomo]

I tested with large guppy-generated inputs from both ONT and HPRC data with no issues, thus all errors seem to be resolved. Input datasets and command, using 100G memory and 12 CPUs:

# ONT test
guppy_fast5_dir="/.../ONT_official/gm24385_mod_2021.09/multi_fast5/20210510_1127_X4_FAQ32498_b90eaed8"
longreadsum f5 -P "${guppy_fast5_dir}/*.fast5" -o $output_dir -t 12

# HPRC test
guppy_fast5_dir="/.../HPRC/basecalls/GM24149_1/workspace/GM24149_1/20190129_0227_2-A1-D1_PAD29702_c7e7f995/fast5/"
longreadsum f5 -P "${guppy_fast5_dir}/*.fast5" -o $output_dir -t 12