[fix][broker] fix delay queue sequence issue.

[thetumbled]

Motivation

When a group of delay messages reach to theire timestamp, we expect that the dispatch sequence in accordance with the message id.
Yet there is corner case that will break this rule, we can reproduce the problem with the unit test testDelaySequence in this pr.
The root reason is that the inner map of delayedMessageMap is Long2ObjectMap<Roaring64Bitmap> instead of Long2ObjectSortedMap<Roaring64Bitmap>.

Modifications

Change the type of delayedMessageMap to Long2ObjectSortedMap<Long2ObjectSortedMap<Roaring64Bitmap>>.

Verifying this change

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

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• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

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Matching PR in forked repository

PR in forked repository: thetumbled#72

[lhotari]

LGTM

[lhotari]

@thetumbled Is it #23611 where the regression was introduced? Does the previous implementation have a similar issue?