Ensure generated imports doesn't start with digit

[leitzler]

Description

Please include a summary of the changes and the related issue. Please also include relevant motivation and context.

• Fixes #805

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Version of Go used when building/testing:

• [x] tip

How Has This Been Tested?

Updated unit tests.

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [-] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[LandonTClipp]

Thanks for the fix. I'm a bit confused as to why mockery is doing this in the first place but regardless it seems like this will work. Will merge once the checks pass.

[LandonTClipp]

Look like github.com/vektra/mockery/v2/pkg/fixtures/12345678/http was not actually included in this PR?

[leitzler]

Ops, apologies, just pushed it too.

I'm a bit confused as to why mockery is doing this in the first place [..]

Yeah, me too. Feels like just adding a digit at the end would be enough. But I thought this fix was least intrusive as it won't change the existing behaviour 😅