Fixing issues with test workflow

[tsackton]

Fixed some issues with the test data caused by using --configfile with snakemake 6.10:

• Refactored .test directory to have separate directory structures for Ecoli and anemone test datasets with config and data subdirs
• Changed github actions workflow to avoid --configfile flag and instead point to proper test directory
• Pinned sra-toolkit to 2.10 to avoid a conda build issue with 2.11
• Fixed a &>> that fails on some versions of bash