Use ProjectMember access_level_roles for invite members modal

What does this MR do?

Uses ProjectMember.access_level_roles for the dropdown when inviting members to Project.

It was previously using GroupMember.access_level_roles.

Fixes https://gitlab.com/gitlab-org/gitlab/-/issues/322081

This is behind the feature flag :invite_members_group_modal

Feature flag rollout issue: https://gitlab.com/gitlab-org/gitlab/-/issues/247208

Screenshots (strongly suggested)

Owner access level was previously displayed incorrectly as an option when inviting members to project using the invite members modal.

before	after

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

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related to #322081