`using xxx` badly interacts with `eval`ed expressions

[aviatesk]

MRE:

julia> using JET                        # JET is in the current environment

julia> @eval JET using JuliaInterpreter # JuliaInterpreter is not listed in the current environment, but is a dependency of JET
 │ Package JuliaInterpreter not found, but a package named JuliaInterpreter is available from a registry. 
 │ Install package?
 │   (@v1.8) pkg> add JuliaInterpreter 
 └ (y/n/o) [y]: n

Since using JuliaInterpreter doesn't require package installation inside the module context of JET,
we ideally want to avoid the package installation suggestion in above.

[JeffBezanson]

I don't think this is intended to work. We should only switch package environments during loading, not for every eval.

[IanButterworth]

Even if code loading like this is not guaranteed, I think the way this is behaving is unhelpful.

#43457 is a suggested fix