[lucaskarsten]

Fixes # . No issue for this. dev CI has been failing since #10328.

Description of the problem being solved:

#10328 removed the hardcoded Requires Level 48 from That Which Was Taken, along with the other unique level requirements, because the requirement is now derived from the item's mods. spec/System/TestRareLike_spec.lua:84 still asserted 48, so busted has failed on dev since that merge. The run_tests job fails at TestRareLike_spec.lua @ 80 on dev (3dbca44) and on PRs opened since then, for example the runs on bugfix/polaric-devastation and feature/abyss-node-lines.

This PR removes the fixed assertion and adds a test for the derived requirement instead. The test crafts AnimalCharmMaximumRage2 onto the jewel and checks that the level requirement is max(base level, floor(mod level * 0.8)). For that mod this gives 48 (level 60 mod), the value the old line had.

Only the spec changes. No source or data files are touched.

Steps taken to verify a working solution:

• Ran busted --lua=luajit with CI=true in the pathofbuilding-tests image on dev (3dbca44): 666 successes / 1 failure before, 668 successes / 0 failures after.
• Changed the 0.8 factor in Item.lua to 0.7 and confirmed the new test fails (expected 48, got 42).
• Checked the 0.8 rule against 7 real rare items from my character's API data (belt, gloves, rings, helmet, wand, body armour): the predicted requirement matched in-game in all 7, including one with a bench-crafted mod that sets the requirement.
• Checked that the levels of the charm mods in ModJewelCharm.lua match the current game data (238/238).

Link to a build that showcases this PR:

N/A (test only)

Before screenshot:

N/A

After screenshot:

N/A