test/run-cli-tests: install wheel before cram to fix build failure

test/run-cli-tests: install wheel before cram to fix build failure

Fix the run-cli-tests failure that occurs when installing cram from git.
The error happens because the fresh venv lacks build dependencies, causing
pip to fall back to legacy setup.py install which fails:

  Using legacy 'setup.py install' for cram, since package 'wheel' is not installed.
  Installing collected packages: cram
    Running setup.py install for cram: started
    error: subprocess-exited-with-error

    × Running setup.py install for cram did not run successfully.
    │ exit code: 1
    ╰─> See above for output.

    note: This error originates from a subprocess, and is likely not a problem with pip.
    Running setup.py install for cram: finished with status 'error'
  error: legacy-install-failure

  × Encountered error while trying to install package.
  ╰─> cram

The issue became visible after commit 70880723eaa updated the pip URL
format to the new PEP 440 style, which exposed the missing build tools.

Solution: Upgrade pip, setuptools, and wheel before installing cram to
ensure proper wheel-based installation works correctly with Python 3.13
and modern pip versions.

Signed-off-by: Kefu Chai <k.chai@proxmox.com>