Fix SimpleSquashingChunksTransform

[nickitat]

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):

Fixed rare bug in SimpleSquashingChunksTransform that may lead to a loss of the last chunk of data in a stream.

---

Analyzer became a victim, because it puts SimpleSquashingChunksTransform before MemorySink when collecting data into a temp table.

Fixes: #62173 #62192

[robot-ch-test-poll]

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Check name	Description	Status
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Stateful tests	Runs stateful functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	❌ failure
Stateless tests	Runs stateless functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	❌ failure
Stress test	Runs stateless functional tests concurrently from several clients to detect concurrency-related errors	❌ failure

Successful checks

Check name	Description	Status
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[nickitat]

AST fuzzer (ubsan) - #62486
Stateless tests (debug) [2/5] - #62487
Stateful tests (msan) - #62252