Remove bionic mana penalty

[chaosvolt]

Summary

SUMMARY: Balance "Bionic power no longer affects maximum mana"

Purpose of change

Per discussion on the BN discord, implementing an in-repo example of mana-casting that isn't affected by the bionic energy penalty was running into delays (as the main example of it in action was planned to be Arcana mod, when it's ported over to become an in-repo mod), and most opinions have weighed in favor of it being fine to just axe the feature outright.

Describe the solution

1. In magic.cpp, updated known_magic::max_mana to remove the bp_penalty feature entirely.
2. Updated enchantment_test.cpp, removing test cases and data only relevant to testing if the now-removed penalty is working correctly.

Describe alternatives you've considered

1. Rigging a quick-and-dirty in-repo solution to allow [DDA Port] Add mutation value that lessens bionic power penalty on mana cap #1823 to be merged without any more delays.
2. Moving forward with porting over Arcana anyway and just figuring out what the merge order should be to get it all to come together without causing any problems.

Testing

1. Compiled and load-tested.
2. Spawned in a character and debugged in all spells.
3. Observed max mana was default of 1000.
4. Debugged in some filled power storage.
5. Waited a bit and confirmed man mana didn't change.
6. Checked affected file for astyle.

Additional context

[olanti-p]

There are tests that check that the penalty exists & works, it has to be remove from there as well

-------------------------------------------------------------------------------
Mana pool
-------------------------------------------------------------------------------
enchantment_test.cpp:551
...............................................................................

enchantment_test.cpp:511: FAILED:
  REQUIRE( guy.magic->max_mana( guy ) == t.norm_cap )
with expansion:
  1000 (0x3e8) == 750 (0x2ee)
with message:
  t.idx := 2

-------------------------------------------------------------------------------
Mana pool
-------------------------------------------------------------------------------
enchantment_test.cpp:551
...............................................................................

enchantment_test.cpp:511: FAILED:
  REQUIRE( guy.magic->max_mana( guy ) == t.norm_cap )
with expansion:
  1,000 (0x3e8) == 750 (0x2ee)
with message:
  t.idx := 2

[chaosvolt]

Was just now working on that, yes.