feat(select): add event for when overlay is dismissed

[EinfachHans]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: #24088

What is the new behavior?

• New Event ionDismiss is emitted when the created overlay is dismissed

Does this introduce a breaking change?

• Yes
• No

Other information

[averyjohnston]

Thanks for the PR, I've left a couple comments below. I also wanted to give you a heads up that Ionic is in a feature freeze until the release of v6, so this won't be merged until then.

[EinfachHans]

@amandaesmith3 I have done your requests 😊 Yeah i totaly understand the feature freeze and having this first in v6 is not a problem for me

This looks good now 👍 We'll merge it after Ionic 6 has released. Thanks for your work!

[averyjohnston]

Reverting so changes can be pushed to a feature branch instead. Will open a new PR.