Resolve CodeQL alert for "Unvalidated dynamic method call"

[tdonohue]

Describe the bug
In our Angular 16 upgrade PR #2871, GitHub's CodeQL scanner noted a possible "Unvalidated dynamic method call" error: https://github.com/DSpace/dspace-angular/pull/2871/checks?check_run_id=23429832711

The error is noted on this line of code:

dspace-angular/src/app/core/lazy-service.ts

Line 29 in 86ddd45

return loader()

See also https://github.com/DSpace/dspace-angular/security/code-scanning/131 (This link may only work for Committers)

This alert needs to be addressed prior to the 8.0 final release. Assigning to @atarix83 as he / his team added this code.

Related work
Alert first appeared in #2871, but the code was first added in #2750 .