Add a .deleteDirectory option to the .record trait

delete the directory before recording - removes artefacts such as after a rename ... maybe add a warning diagnostic to this to be explicit about possible loss of data

The issue does not name files or tests. Start by locating the .record trait implementation and its existing options, then trace how recording handles renamed-directory artefacts. Done means the option controls directory deletion and a warning diagnostic makes the possible data loss explicit.

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