Update parameterize test

[Ultramann]

This PR

1. Updates how shifu_parameterize_test works
   • removes the need to pass n_args
   • introduces a new function shifu_test_params which is used in the tests that are parameterized. It takes any number of strings before -- $@, and assigns values from $@ to variables named for those strings. Theres one magic thing it does, if the variable name starts with @ it will run _shifu_set_for_looping on the value to make the word splitting stuff work right on the inner function
2. The completion tests were rewritten using the new parameterization system
3. Updates how parameterized tests are reported
   • each parameterized test case now counts as one test for the purpose of counting tests in the summary
   • sub tests are reported separately, failures always being reported, and both successes and failures reported in verbose mode
   • the test summary line includes (successes/total) values instead of just percentages