[fix][ml]persistentMarkDeletePosition is ahead of markDeletePosition in ManagedCursor when handling seek request

[HQebupt]

Motivation

When the client seek a position, it will update the read posistion and mark delete position in the cursor. And meanwhile, it will persist the mark delete position to Bookie, then record the persistent mark delete position in the field persistentMarkDeletePosition.

However, The persistent mark delete position persistentMarkDeletePosition is ahead of markDeletePosition after seek , which is obviously unreasonable.

pulsar/managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java

Lines 125 to 132 in cbbcd41

	protected volatile PositionImpl markDeletePosition;
	// this position is have persistent mark delete position
	protected volatile PositionImpl persistentMarkDeletePosition;
	protected static final AtomicReferenceFieldUpdater<ManagedCursorImpl, PositionImpl>
	INPROGRESS_MARKDELETE_PERSIST_POSITION_UPDATER =
	AtomicReferenceFieldUpdater.newUpdater(ManagedCursorImpl.class, PositionImpl.class,
	"inProgressMarkDeletePersistPosition");

Modifications

• Persistent the previous seek position as new persistent mark delete position into Bookie.
• Clean up code

Verifying this change

• Make sure that the change passes the CI checks.

This change is a trivial rework / code cleanup without any test coverage.

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

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): (no)
• The public API: (no)
• The schema: (no)
• The default values of configurations: (no)
• The wire protocol: (no)
• The rest endpoints: (no)
• The admin cli options: (no)
• Anything that affects deployment: (no)

Documentation

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• doc-not-needed

Matching PR in forked repository

PR in forked repository: HQebupt#6

[HQebupt]

@eolivelli @Technoboy- @AnonHxy @Jason918 @codelipenghui PTAL

[HQebupt]

Duplicated with #18237