Minor code updates from missed open comments from #36 to the migratedown feature

[venkat-iblox]

This PR addressed open comments from PR #36

• renamed dirtyStateHandler to dirtyStateConfig
• used IsDirtyHandlingEnabled() in the runMigrations function instead of explicitly checking if the dirty state handling is enabled
• updated comments to use destination dir
• used https://pkg.go.dev/testing#T.TempDir in the UTs added

[daniel-garcia]

The code changes look fine. The commit messages and PR title needs to be descriptive of what is being changed.

[akleinib]

All my comments have been addressed However it doesn't seem that changes related to Docker and build pertain to this PR.

[venkat-iblox]

All my comments have been addressed However it doesn't seem that changes related to Docker and build pertain to this PR.

Thank you, I have removed the files for building a local image for testing. We probably should add a few of these paths into .gitignore.