Default to using NewPM.

[maleadt]

Now that we only support Julia 1.10, which ships LLVM 15, we can almost entirely switch to LLVM's new pass manager.

Also fixes use of the InternalizePass for 1.12.

[codecov]

Codecov Report

Attention: Patch coverage is 77.21519% with 18 lines in your changes missing coverage. Please review.

Project coverage is 67.05%. Comparing base (a0e73b7) to head (7cd0120).

Files	Patch %	Lines
src/driver.jl	44.44%	10 Missing ⚠️
src/metal.jl	72.72%	6 Missing ⚠️
src/irgen.jl	80.00%	1 Missing ⚠️
src/ptx.jl	95.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #604      +/-   ##
==========================================
+ Coverage   65.70%   67.05%   +1.35%     
==========================================
  Files          24       24              
  Lines        3353     3272      -81     
==========================================
- Hits         2203     2194       -9     
+ Misses       1150     1078      -72     

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