Fixes #769 : Mock files getting created in disk when dry-run is enabled

[snopan]

Description

The PR aims to fix an issue with dry-run option when enabled is still creating the mock files in disk. There's an existing PR to resolve this but I can see it's been inactive since April so I thought to start another PR to resolve the comment. If this isn't okay please let me know, I'm still new to contributing to open source.

• Fixes https://github.com/vektra/mockery/issues/769 (issue)

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 Golang used when building/testing:

• [ ] 1.11
• [ ] 1.12
• [ ] 1.13
• [ ] 1.14
• [ ] 1.15
• [ ] 1.16
• [ ] 1.17
• [ ] 1.18
• [ ] 1.19
• [ ] 1.20
• [x] 1.22

How Has This Been Tested?

1. Cleared the mocks by running task mocks.remove
2. Added dry-run: True to mockery.yaml
3. Ran task mocks which should only log and not create the files

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
• [x] 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

[snopan]

Hey @LandonTClipp, I saw the issue was inactive and I thought to give it a try hope it is okay. Feel free to have a review when you're free, thanks.

[LandonTClipp]

Looks like something is wrong, maybe dry-run is getting enabled in the tests when we didn't expect? I'll let you dig into it.

[snopan]

Yup so the original unit test had dryRun set to true while checking that files are created. Instead I've updated the tests to check dryRun as both true and false to confirm that files creation depend on that. I've also removed the wantError field from the test case as it's not used, is this common that fields are added but not used? If we need that there then I can add it back.

@LandonTClipp if I can get another review that would be great, thanks!