Create app with conda dependencies

I'm trying to create a relocatable app that has Python/Conda dependencies. E.g., in the simplest case, I'm creating an app that has PyPlot as the only dependency:

```name = "TestApp"
uuid = "60e04576-4d8c-4856-bc57-482afded9445"
authors = ["user"]
version = "0.1.0"

[deps]
PyPlot = "d330b81b-6aea-500a-939a-2ce795aea3ee"
```

The app itself looks like this (i.e. a simplified version of the example from PackageCompiler.jl):

```
module TestApp

using PyPlot

function julia_main()::Cint
try
real_main()
catch
Base.invokelatest(Base.display_error, Base.catch_stack())
return 1
end
return 0
end

function real_main()
@show ARGS
@show Base.PROGRAM_FILE
@show DEPOT_PATH
@show LOAD_PATH
@show pwd()
@show Base.active_project()
@show Sys.BINDIR

@show Base.JLOptions().opt_level
@show Base.JLOptions().nthreads
@show Base.JLOptions().check_bounds

display(Base.loaded_modules)
println()

println("Running a jll package:")

return
end

end # module
```

Creating the app with `create_app("TestApp", "TestAppCompiled")` works as expected and I can run the binary. However, once I zip the compiled app and run it on a different machine, I'm getting a library error:

`InitError(mod=:PyCall, error=ErrorException("could not load library "/home/user/.julia/conda/3/lib/libpython3.9.so.1.0"`

So, it looks like conda was not included in the app and instead the library file from my local Julia installation is used. Any suggestions on how to address this?

Start at the create_app("TestApp", "TestAppCompiled") entry point and trace how the compiled app handles the PyCall library and its Conda dependency. Reproduce the failure by moving the zipped app to another machine, then verify that it no longer resolves libpython3.9.so.1.0 from the original local Julia installation.

Written by the indexing model from the issue text.