Update local IP address and domain name allow list input label

What does this MR do?

As part of an effort to be more inclusive, we're renaming instances of "whitelist" to "allowlist".

This MR renames the outbound network application settings view, as well as the corresponding backend variable name.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• Separation of EE specific content