Reduce memory usage for multiple alter delete mutations.

[KochetovNicolai]

Changelog category (leave one):

• Improvement

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

Reduce memory usage for multiple ALTER DELETE mutations.

A lot of delete conditions could create many ActionsDAG with O(n^2) nodes. Example (from the test).

[nikitamikhaylov]

Stress test (ubsan) — S3_ERROR No such key thrown
Hello.