Request to backport systemd upstream fix

Upstream PR: https://github.com/systemd/systemd/pull/38677
Title: core/unit: use UNIT_FOREACH_DEPENDENCY_SAFE() at several more places

Description

This PR fixes a dependency loop issue in systemd's core unit management. The fix addresses an assertion error that can occur when manager_add_job() -> transaction_add_job_and_dependencies() updates dependencies while a unit is not yet loaded.

Technical Details

• The fix uses UNIT_FOREACH_DEPENDENCY_SAFE() in additional places to properly handle dependency loops
• This is a follow-up to commit b7777d0 from PR #37465
• Addresses GitHub issue #38676
• Milestone: v258 (already merged upstream)

Impact

• Improves handling of unit dependencies
• Prevents potential assertion errors during dependency generation
• Enhances systemd's dependency management logic

Request

Please backport this fix to RHEL 10's systemd component to prevent potential dependency-related assertion failures.