Use flux test name when running tests instead of the filename

[jsternberg]

At the moment, we run each _test.flux file based on the name of the file itself and any tests that are run within there are part of the same run.

We may want to run the file once for each test defined inside of the file instead of by file. This needs to be done as part of user defined packages so that this can be exposed to external packages.

[github-actions[bot]]

This issue has had no recent activity and will be closed soon.