Drop crab nosort option; fizes for zsh

[smuzaffar]

This PR fixes the following issues

• Update cms-common so that cmsset_default.sh do not fail under zsh ( export -f fails for zsh)
• Drop nosort option from crab auto complete script. This allow it to run it under el7. nosort option was added for bash>=4.4 which in el7 we have bash 4.2
  • See https://cms-talk.web.cern.ch/t/crab-is-not-working/41539 for details
• Fix the logic for zsh

[cmsbuild]

A new Pull Request was created by @smuzaffar for branch IB/CMSSW_14_1_X/master.

@aandvalenzuela, @cmsbuild, @iarspider, @smuzaffar can you please review it and eventually sign? Thanks.
@antoniovilela, @rappoccio, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[cmsbuild]

cms-bot internal usage

[smuzaffar]

please test with cms-sw/cms-bot#2281

[smuzaffar]

please test with cms-sw/cms-bot#2281

[smuzaffar]

please test with cms-sw/cms-bot#2281

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_14_1_X/master IBs after it passes the integration tests. This pull request will now be reviewed by the release team before it's merged. @rappoccio, @sextonkennedy, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)
Notice This PR was tested with additional Pull Request(s), please also merge them if necessary: cms-sw/cms-bot#2281