Throw exception when julia --version fails.

[lte678]

Recently, I managed to corrupt my julia installation so that julia --version returned

% julia --version
ERROR: Unable to load dependent library /home/user/.julia/juliaup/julia-1.11.3+0.x64.linux.gnu/bin/../lib/julia/libopenlibm.so
Message:/home/user/.julia/juliaup/julia-1.11.3+0.x64.linux.gnu/bin/../lib/julia/libopenlibm.so: cannot enable executable stack as shared object requires: Invalid argument

This is of course an edge case, but did lead to the following confusing stacktrace, so an exception has been added in case the command fails.

(Confusing) Stacktrace:

[juliapkg] Found dependencies: /home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/juliapkg.json
[juliapkg] Found dependencies: /home/user/Documents/Work/CERN/hets/juliapkg.json
[juliapkg] Found dependencies: /home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliacall/juliapkg.json
[juliapkg] Locating Julia ~1.11
Traceback (most recent call last):
  File "/home/user/Documents/Work/CERN/hets/./hets.py", line 94, in <module>
    from hets.solver import get_latest_solver_dir
  File "/home/user/Documents/Work/CERN/hets/hets/solver/__init__.py", line 1, in <module>
    from .problem import HETSProblem
  File "/home/user/Documents/Work/CERN/hets/hets/solver/problem.py", line 19, in <module>
    torch = import_torch()
            ^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/hets/support/__init__.py", line 36, in import_torch
    import_julia()
  File "/home/user/Documents/Work/CERN/hets/hets/support/__init__.py", line 27, in import_julia
    import juliacall
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliacall/__init__.py", line 287, in <module>
    init()
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliacall/__init__.py", line 159, in init
    CONFIG['exepath'] = exepath = juliapkg.executable()
                                  ^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/deps.py", line 381, in executable
    resolve()
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/deps.py", line 307, in resolve
    exe, ver = find_julia(
               ^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/find_julia.py", line 75, in find_julia
    ans = ju_find_julia(ju_compat, install=install)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/find_julia.py", line 149, in ju_find_julia
    ans = ju_find_julia_noinstall(compat)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/find_julia.py", line 199, in ju_find_julia_noinstall
    if compat is None or ver in compat:
                         ^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/compat.py", line 31, in __contains__
    return any(v in clause for clause in self.clauses)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/compat.py", line 31, in <genexpr>
    return any(v in clause for clause in self.clauses)
               ^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/compat.py", line 169, in __contains__
    return self.lo <= v < self.hi
           ^^^^^^^^^^^^^^^^^^^^^^
TypeError: '<=' not supported between instances of 'Version' and 'NoneType'

Instead, the error message is now:

[juliapkg] Locating Julia ~1.11
Traceback (most recent call last):
  File "/home/user/Documents/Work/CERN/hets/./hets.py", line 94, in <module>
    from hets.solver import get_latest_solver_dir
  File "/home/user/Documents/Work/CERN/hets/hets/solver/__init__.py", line 1, in <module>
    from .problem import HETSProblem
  File "/home/user/Documents/Work/CERN/hets/hets/solver/problem.py", line 19, in <module>
    torch = import_torch()
            ^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/hets/support/__init__.py", line 36, in import_torch
    import_julia()
  File "/home/user/Documents/Work/CERN/hets/hets/support/__init__.py", line 27, in import_julia
    import juliacall
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliacall/__init__.py", line 287, in <module>
    init()
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliacall/__init__.py", line 159, in init
    CONFIG['exepath'] = exepath = juliapkg.executable()
                                  ^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/deps.py", line 381, in executable
    resolve()
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/deps.py", line 307, in resolve
    exe, ver = find_julia(
               ^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/find_julia.py", line 75, in find_julia
    ans = ju_find_julia(ju_compat, install=install)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/find_julia.py", line 149, in ju_find_julia
    ans = ju_find_julia_noinstall(compat)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Documents/Work/CERN/hets/venv/lib/python3.12/site-packages/juliapkg/find_julia.py", line 200, in ju_find_julia_noinstall
    raise Exception(f'WARNING: Failed to execute {exe} --version')
Exception: WARNING: Failed to execute /home/user/.julia/juliaup/julia-1.11.3+0.x64.linux.gnu/bin/julia --version