fix(runtime): a class function object keeps its evaluation state and prototype link in separate captures (main build)

[proggeramlug]

main does not compile since #11843 merged: #11840 put the class function object's evaluation state in capture 1 and #11843 put the prototype link in capture 1 too, and the merge committed the conflict markers in crates/perry-runtime/src/object/class_value.rs.

• The evaluation state keeps capture 1 (codegen writes it at CLASS_EVALUATION_STATE_CAPTURE).
• The prototype link moves to capture 2; the class function object is minted with three captures.
• Const asserts keep the two slots apart.

Verified on perrymaster: release build of perry + runtime/stdlib OK, cargo fmt --check OK; the 16 class-evaluation / fresh-class gap and parity tests (11759*, 11042, 11112, 11163, 10624, 9239, class-expression fresh tests) match node; the vtable lane benches match node.

Not fixed here (pre-existing, separate): conflict markers in scripts/gc_runtime_root_holders.json (a PASS1_MARKED re-audit pin with source hashes; it needs a real re-audit).

Summary by CodeRabbit

• Bug Fixes
  • Fixed a conflict during class construction that could interfere with evaluation state and prototype behavior.
  • Class instances now retain their expected prototype behavior while class evaluation proceeds.

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📒 Files selected for processing (2)

• changelog.d/class-value-capture-conflict.md
• crates/perry-runtime/src/object/class_value.rs

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