Pkg.test(; julia_args = ["--threads=auto"]) seems to not have effect on julia 1.12.0-beta2 #4220
Description
It seems #4141 somehow did not have effect in 1.12.0-beta1 despite inclusion in #4203.
$ nproc
16
$ cd Example.jl
$ echo '@show Threads.nthreads()' >> test/runtests.jl
$ rm -f Manifest.toml
$ julia +1.11 --project --eval 'using Pkg; Pkg.test(; julia_args = ["--threads=auto"])'
...
Testing Running tests...
Threads.nthreads() = 16
$ rm -f Manifest.toml
$ julia +1.12 --project --eval 'using Pkg; Pkg.test(; julia_args = ["--threads=auto"])'
...
Testing Running tests...
Threads.nthreads() = 1