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interp: split loaded vs applied tool offset params (#5401-#5409, #5081-#5089)#4228

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interp: split loaded vs applied tool offset params (#5401-#5409, #5081-#5089)#4228
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grandixximo:fix/4216-applied-tlo-params-master

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Forward-port of #4219 (merged to 2.9) to master, fixing #4216.

#5401-#5409 again hold the loaded tool's stored offset (refreshed on M6 / G10 / init), restoring the behavior probing routines in the wild rely on. The offset actually applied to motion by G43/G43.1/G43.2 moves to the new parameters #5081-#5089, and is zeroed by G49.

Two commits:

Full test suite passes locally (291 tests, 0 failed).

…1-#5089)

Commit 725231f made #5401-#5409 report the tool length offset actually
applied to motion. That matched the documentation, but broke probing
routines in the wild that read #5401-#5409 right after an M6 (without a
following G43) to get the loaded tool's stored offset. See LinuxCNC#4216.

Restore the long-standing behavior of #5401-#5409 and put the applied
offset in a new parameter set instead:

  - #5401-#5409: loaded tool's stored offset, refreshed from the tool
    table on tool change (M6), at startup, and by G10 L1/L10/L11.
    Reverts the convert_setup_tool / set_tool_parameters /
    default_tool_parameters / init_tool_parameters changes from 725231f
    so existing routines keep working.
  - #5081-#5089: tool length offset actually applied to motion, written
    by convert_tool_length_offset for G43, G43Hn, G43.1, G43.2, and
    zeroed by G49. This is the value 725231f intended to expose.

Docs (overview.adoc, g-code.adoc) and the interp_parameter_def.hh enum
updated to describe both sets.

Fixes LinuxCNC#4216. Re-addresses LinuxCNC#2994 without the regression.
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