ci: Update Tachometer reporter glob to support subdirs

[rschristian]

This should then be the last piece for #4515

==> Downloading: results-todo_todo.zip (1.84 kB)
==> Extracting: results-todo_todo.zip
    inflating: results/results-todo_todo/todo.json
==> Artifact: 1993869934
==> Downloading: results-text-update_text-update.zip (2.58 kB)
==> Extracting: results-text-update_text-update.zip
    inflating: results/results-text-update_text-update/text-update.json

etc. Extra nest as we're now downloading results separately instead of as one.

[coveralls]

coverage: 99.488%. remained the same
when pulling f8b9860 on ci/fix-tachometer-report-glob
into 703af77 on main.