[BUG] Backup failing in pulp-secret-key

[git-hyagi]

Describe the bug
Pulpbackup is failing to handle special chars from pulp_secret_key.

To Reproduce
Create a pulp_secret_key Secret with the following content:

secret: '&6--z68!&m%c!%1dgqm__j!6%&cma=*cxi#k7h=rx+w7*e(082'

Expected behavior
The backup should be able to handle the special chars and not fail.

Additional context
From a quick investigation, I believe, one of the issues (not sure if it can have others), can be related with the contiguous chars !&:

# echo "pulp_secret_key: pulp-secret-key\nsecret_key: '&6--z68!&m%c!%1dgqm__j!6%&cma=*cxi#k7h=rx+w7*e(082'\n"
bash: !: event not found

# echo "pulp_secret_key: pulp-secret-key\nsecret_key: '&6--z68\!&m%c!%1dgqm__j!6%&cma=*cxi#k7h=rx+w7*e(082'\n"
pulp_secret_key: pulp-secret-key\nsecret_key: '&6--z68\!&m%c1dgqm__j&cma=*cxi#k7h=rx+w7*e(082'\n     

[git-hyagi]

This error is probably impacting the execution of our pipeline.
Sometimes it fails in the Backup & Restore job. Checking the logs:
https://pipelinesghubeus23.actions.githubusercontent.com/1Lwo4Fb5DjyurMJDeqU9gfUecpElEZcw7d5EWtmMNm7eWF3cBc/_apis/pipelines/1/runs/6393/signedlogcontent/15?urlExpires=2023-10-03T14%3A53%3A37.0957919Z&urlSigningMethod=HMACV1&urlSignature=pQW68Wd%2BrQG4qYHNJ1C2b8vVGe6dwlpQDAXGzn66jmA%3D

...
2023-09-29T03:27:19.3717364Z 2023-09-29T03:14:21Z	�[34mINFO�[0m	backup/database.go:52	Database Backup finished!
2023-09-29T03:27:19.3717683Z 2023-09-29T03:14:21Z	�[34mINFO�[0m	backup/cr.go:29	Starting galaxy CR backup process ...
2023-09-29T03:27:19.3718183Z 2023-09-29T03:14:22Z	�[31mERROR�[0m	backup/secret.go:164	Failed to backup galaxy-example-secret-key secret	{"error": "command terminated with exit code 2"}
2023-09-29T03:27:19.3718575Z github.com/pulp/pulp-operator/controllers/backup.(*RepoManagerBackupReconciler).createBackupFile
2023-09-29T03:27:19.3718926Z 	/home/runner/work/pulp-operator/pulp-operator/controllers/backup/secret.go:164
...