Support command overloading in a binary compatible fashion #5376
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Fixes #5281
The previous code already collected all command overloads in the
Discoverdata structure, but it returned one arbitrarily when queried. This PR makes it return the one with the longer argument list, which supports@unroll-style signature evolution of adding parameters with default values to the right side of a parameter list.Added a unit test that fails on main, passes on this PR