conda-build should check if runtime dependencies are valid matchspecs

[jaimergp]

What happened?

It doesn't seem like conda-build ensures that run and run_constrained dependencies are valid MatchSpec objects. Otherwise, I don't know how to explain this issue, where a package had wrongly specified the following run_constrained item:

 - cloudpickle >=2.2.1<2.3.0 

Which results in the following error when conda classic tries to install it:

InvalidVersionSpec: Invalid version '2.2.1<2.3.0': invalid character(s)

I'd say conda-build should try to convert all those items to a MatchSpec before reporting the package as successfully built.

Conda Details

conda info

active environment : conda-dev
    active env location : /Users/jrodriguez/.local/anaconda/envs/conda-dev
            shell level : 2
       user config file : /Users/jrodriguez/.condarc
 populated config files : /Users/jrodriguez/.local/anaconda/.condarc
                          /Users/jrodriguez/.condarc
          conda version : 23.9.0
    conda-build version : 3.26.1
         python version : 3.9.9.final.0
       virtual packages : __archspec=1=m1
                          __osx=13.5.2=0
                          __unix=0=0
       base environment : /Users/jrodriguez/.local/anaconda  (writable)
      conda av data dir : /Users/jrodriguez/.local/anaconda/etc/conda
  conda av metadata url : None
           channel URLs : https://conda.anaconda.org/conda-forge/osx-arm64
                          https://conda.anaconda.org/conda-forge/noarch
          package cache : /Users/jrodriguez/.local/anaconda/pkgs
                          /Users/jrodriguez/.conda/pkgs
       envs directories : /Users/jrodriguez/.local/anaconda/envs
                          /Users/jrodriguez/.conda/envs
               platform : osx-arm64
             user-agent : conda/23.9.0 requests/2.31.0 CPython/3.9.9 Darwin/22.6.0 OSX/13.5.2 solver/libmamba conda-libmamba-solver/23.9.1 libmambapy/1.5.1
                UID:GID : 501:20
             netrc file : None
           offline mode : False

conda config

==> /Users/jrodriguez/.local/anaconda/.condarc <==
channels:
  - conda-forge

==> /Users/jrodriguez/.condarc <==
add_pip_as_python_dependency: False
auto_update_conda: False
local_repodata_ttl: 0
channel_priority: strict
channels:
  - conda-forge
show_channel_urls: True
report_errors: False
experimental:
  - jlap
solver: libmamba