feat: grow default PTFE frontend size

[deimosfr]

Related to this post:
https://www.reddit.com/r/prusa3d/comments/1lxgju8/how_i_raised_ptfe_mmu_length_to_5000mm_for_coreone/

having more size helps to achieve alternative setup

[github-actions]

All values in bytes. Δ Delta to base

ΔFlash	ΔSRAM	Used Flash	Used SRAM	Free Flash	Free SRAM
0	0	28078	1667	594	893

[gudnimg]

There are four unit tests failing:

The following tests FAILED:
	 22 - unload_to_finda::unload_without_FINDA_trigger (Failed)
	 24 - unload_to_finda::unload_repeated (Failed)
	 47 - unload_filament::finda_didnt_trigger_resolve_try_again (Failed)
	 49 - unload_filament::failed_unload_to_finda_0-4_resolve_manual_FINDA_on (Failed)
Errors while running CTest


unload_filament::failed_unload_to_finda_0-4_resolve_manual_FINDA_on
-------------------------------------------------------------------------------
/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_filament/test_unload_filament.cpp:266
...............................................................................
/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_filament/test_unload_filament.cpp:138: FAILED:
  REQUIRE( WhileCondition( uf, [&](uint32_t step) { SimulateUnloadToFINDA(step, 10, 1'000'000); return uf.TopLevelState() == ProgressCode::UnloadingToFinda; }, 200'000) )
with expansion:
  false
  
  
-------------------------------------------------------------------------------
/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_filament/test_unload_filament.cpp:192
...............................................................................

/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_filament/test_unload_filament.cpp:138: FAILED:
  REQUIRE( WhileCondition( uf, [&](uint32_t step) { SimulateUnloadToFINDA(step, 10, 1'000'000); return uf.TopLevelState() == ProgressCode::UnloadingToFinda; }, 200'000) )
with expansion:
  false
  
  
/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp:162
...............................................................................

/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp:200: FAILED:
  REQUIRE_FALSE( WhileCondition(ff, std::bind(SimulateUnloadToFINDA, _1, 10, 150000), unlSteps) )
with expansion:
  !true
  
  
unload_to_finda::unload_without_FINDA_trigger
-------------------------------------------------------------------------------
/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp:79
...............................................................................

/home/runner/work/Prusa-Firmware-MMU/Prusa-Firmware-MMU/tests/unit/logic/unload_to_finda/test_unload_to_finda.cpp:115: FAILED:
  REQUIRE_FALSE( WhileCondition(ff, std::bind(SimulateUnloadToFINDA, _1, 10, 150000), unlSteps) )
with expansion:
  !true

[DRracer]

It's tempting to play with the config file, isn't it 😉 . However, here are my concerns related to increasing the limit to 5m:

• Do you realize, that such a long PTFE already causes significant friction and the printer will have a hard time pulling/pushing the filament? Have you actually measured how it behaves? I don't think this is something we want do give to ordinary users in a stock FW in order to prevent bogus bug reports about failed tool changes and blobs on the purge towers. Experienced users who can tune their PTFE tubing correctly can compile their own FW and as long as it keeps its version numbers it will work just fine.
• I'm not sure if we can step that far in a single move without overflowing inside the MMU FW. This needs to be checked very carefully. Adding a unit test for the motion module would be the appropriate way of doing it. Of course, moves can be split into shorter pieces and appended in the motion module, but that's some extra code which is currently not there.
• Unit tests are obviously failing, there are some fixed simulation steps roughly tuned for a maximum of 1m distance. This can be fixed easily.

[deimosfr]

I understand your points and I'll close the PR. The rewinding is having regular issues, I won't continue into that direction.