fix: upload store fixes

[acha-bill]

Checklist

• I have read the coding guide.
• My change requires a documentation update, and I have done it.
• I have added tests to cover my changes.
• I have filled out the description and linked the related issues.

Description

1. Remove stamp index check from uploadPutter.Put
2. Delete all associated uploadItems after close

Open API Spec Version Changes (if applicable)

Motivation and Context (Optional)

Related Issue (Optional)

Closes #4541

Screenshots (if appropriate):

[istae]

we should also add a new migration step that removes all leftover items from previous sessions.
in the next release, we can add a line in the release notes that the new release will cleanup all upload items so that before deploying the new release, all uploads must first finish.