Resolve "mpsd-software install error should only show release branches"

Closes #50 (closed) The MR implements the folloing:

• Fix typos.
• print only "released" branch on checkout failure: before:

luedersm@poppyseed:~/mpsd-software$ mpsd-software install dev-23b foss2022a-serial
[15:09:01] ERROR    Couldnt find branch=releases/dev-23b                         filesystem_utils.py:137
                    Available branches are ['* releases/23c',
                    '18-make-target-for-foss-cuda-mpi',
                    '21-octopus-module-inside-toolchians', '23b-in-debian12',
                    '28-implement-intel-2021a-toolchain',
                    '42-23b-berkeleygw-has-no-scalapack-variant-in-spackv0-20',
                    '99589-Enable-specifying_of_system_compiler', 'HEAD ->
                    origin/releases/23c', 'add-perl-yaml',
                    'add-psolver-into-toolchains', 'dev-23a', 'develop',
                    'docker-mount-buildcache',
                    'fix-non-mpi-packages-in-build-matrix', 'no-padding',
                    'releases/23b', 'releases/23c', 'releases/24a',
                    'releases/dev-23a', 'releases/v0000a', 'test-mpcdf-compile',
                    '']

after:

❯ mpsd-software install test foss2022a-serial
[23:33:37] ERROR    Couldn't find the branch=releases/test                                                                         filesystem_utils.py:140
                    Available branches are ['releases/23b', 'releases/23c', 'releases/24a', 'releases/dev-23a',                                      
                    'releases/v0000a']   

• remove the mpsd_release folder which was created by the clone, in order to prevent subsequent runs of the faulty mpsd_release from passing.

before:

 $ mpsd-software install test foss2021a-mpi
  Couldnt find branch ..........  # But the test/spe folder is created
 $ mpsd-software install test foss2021a-mpi
  Cloning spack ................. # Since the folder exists, the clone is not run thus the installer continues with the faulty mpsd_release

after:

 $ mpsd-software install test foss2021a-mpi
  Couldn't find the branch ..........  # the test/spe folder is deleted
 $ mpsd-software install test foss2021a-mpi
   Couldn't find the branch ..........  # the test/spe folder is deleted