Fixes bugs and tweaks outputs, including:
- Removes --analysis-mode fast from pangolin call so it uses usher (by default)
- Adds sequencing_tech and sample_sequencing_datetime fields to qc_and_lineages summary file * (and downstream reports)
- Changes "stringent" condition to use "overall_fail" (more exclusive) rather than "any_fail"
- Changes logging to include stdout instead of just stderr
- Adds retry for AWS downloads because of intermittent failures
- Fixes search-and-replace error where "qc" was replaced by "src"