KIP-667 — Remove deprecated methods from ReadOnlyWindowStore

Discarded Kafka 3.0 Streams

Removes the deprecated `long`-based query methods from `ReadOnlyWindowStore` and restores the `long`-based methods on the read-write `WindowStore` Processor API interface without deprecation. Having `long`-based methods deprecated on both the read-only interactive query API and the Processor API was overly aggressive; the Processor API uses longs for performance and should not incur the overhead of `Instant` object allocation.

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