Fix assign security check permission checks

What does this MR do and why?

Fix assign security check permission checks.

This MR fix the permissions check to assign a security project.

Project owner should be able to link a security policy project if they have any level of access to it.

Related to: #430707 (closed)

Backport of Fix assign security check permission checks (!135977 - merged) to %16.5

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.

Related to #430707 (closed)