[fix][broker] pattern regex error in PulsarLedgerManager cause zk data notification can not execute

[TakaHiR07]

Motivation

ledger zk path is like "/ledgers/00/0601/L7170". But currently it exist pattern regex error cause zk data notification can not execute.

ledgerPathRegex.matcher(n.getPath()).matches() is always false.

Modifications

use correct pattern.

Alternative modification: remove the judgement in handleDataNotification(), since getLedgerId(n.getPath()) would throw error if the path is not ledger path.

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

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

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• 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:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• 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
• The public API

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[thetumbled]

Some test is requried to ensure the notification logic is triggered and works correct.