Adding a custom entry for trailling-whitespace

[evallesp]

We're adding a wrapper around trailing-whitespace-fixer, which is the default entry https://github.com/pre-commit/pre-commit-hooks/blob/main/.pre-commit-hooks.yaml#L205

So now, instead of directly call it, we are checking if is there any space in the files, if so, then we add it to the list and we call trailing-whitespace-fixer. if not file, then we don't execute anything and we retrieve success.

Apart of impacting positive as we're not calling by default the trailing-whitespace-fixer python script, now we can see the files that needs to remove the whitespace.

[openshift-ci]

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[evallesp]

Output of previous patch version where we got some trailling whitespaces:

[INFO] This may take a few minutes...
fix end of files.........................................................Passed
trim trailing whitespace.................................................Failed
- hook id: trailing-whitespace
- exit code: 1
- files were modified by this hook

create-infra.yml
Fixing create-infra.yml
scripts/create_role_molecule.py
Fixing scripts/create_role_molecule.py
roles/update_containers/defaults/main.yml
Fixing roles/update_containers/defaults/main.yml