JENKINS-73941 - ForceSandbox - Unify logic in Script-Security for reducing techDebt

[jgarciacloudbees]

JENKINS-73941 - - Option to hide "Use Groovy Sandbox" for users without Administer permission globally in the system

Complements:
#584
#585

After releasing jenkinsci/workflow-cps-plugin#948 we have realized that some logic can be unified between Script-Security and Workflow-CPS plugin.

To do so, we have created the new static methods:

• org.jenkinsci.plugins.scriptsecurity.scripts.ScriptApproval#shouldHideSandbox
• org.jenkinsci.plugins.scriptsecurity.scripts.ScriptApproval#validateSandbox

This PR does not include any new functionality, but decrease the techDebt maintaining both, Script-Security and Workflow-CPS Plugin

Testing done

Created new test cases for the created methods.

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