fix: do not use autoloading for seeder class check

[tiller1010]

https://werkbotstudios.teamwork.com/app/tasks/39519302

Summary

do not use autoloading for seeder class check

Testing Steps

• test with the werkbot site https://github.com/werkbot/werkbot/pull/158
• confirm no error shows on dev/build

Issues/Concerns

• This just fixes an error on dev/build: "Cannot declare class because the name is already in use in". It does not allow the seeder to be used on sites not on 5.3, like the werkbot site, where the psr-4 updates changed class names.

Git Flow

• DO NOT delete "release/*" or "hotfix/*" branches after merging a PR. These are used to publish the next release, and they are deleted automatically.
• "Squash and merge" is good on "feature/*" into "develop"
• "Create a merge commit" is good on "release/*" or "hotfix/*" into "main"

[aletail]

Looks good!