DROP INDEX of inverted index now removes all relevant files from persistence

[MochiXu]

Fixes #59039

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Experimental feature of inverted indices: ALTER TABLE DROP INDEX for an inverted index now removes all inverted index files from the new part (issue #59039).

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