Stub apply trial service less

What does this MR do and why?

Allows apply trial service to be initialized more naturally instead of using a stub. This test modification would've caught the issue fixed in !109773 (merged)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

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

Related to #389040