fix precompile on 1.12

[oscardssmith]

JuliaLang/julia#58131 unifies the method table, so this is necessary to make Enzyme precompile on 1.12.

Should we do something to make sure CI succeeds in loading Enzyme on 1.12? (even if we don't expect tests to pass).

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.06%. Comparing base (037dfed) to head (a6ca5d4).
⚠️ Report is 447 commits behind head on main.

Files with missing lines	Patch %	Lines
src/rules/jitrules.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2498      +/-   ##
==========================================
+ Coverage   67.50%   75.06%   +7.55%     
==========================================
  Files          31       56      +25     
  Lines       12668    17306    +4638     
==========================================
+ Hits         8552    12990    +4438     
- Misses       4116     4316     +200     

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[wsmoses]

yeah completely agreed