springboot Upgrade to Flyway 6.2 and support new validate migration naming property

This PR adds support for property flyway.validateMigrationNaming, which is added in Flyway v6.2.0 for validating naming convention of the migration files. See https://github.com/flyway/flyway/releases/tag/flyway-6.2.0.

Comment From: snicoll

@kedar-joshi thank you for the PR. Small note: going forward, please prepare the PR on your local copy as each commit sends a notification to 3K+ watchers.

Comment From: kedar-joshi

@kedar-joshi thank you for the PR. Small note. Going forward, please prepare the PR on your local copy as each commit sends a notification to 3K+ watchers.

Noted, thanks. I will take care of this in the future.

Comment From: kedar-joshi

Hi, considering v2.3.0 GA is months away, I am wondering if there is any plan to backport this to v2.2.x.

Comment From: wilkinsona

We don’t have any plans to back port this. We won’t upgrade to a new minor of Flyway in a maintenance release of Spring Boot.