[improve][broker] defer the ownership checks if the owner is inactive (ExtensibleLoadManager)

[heesung-sn]

Cherry-picked #21811

Documentation

• doc-not-needed

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[heesung-sn]

Seems like this test is consistently failing, although it should not be related to this PR.

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/ CI - Unit - Other
ManagedLedgerTest.testNoCleanupOffloadLedgerWhenMetadataExceptionHappens
CompletableFuture cannot be returned by getPassword()
getPassword() should return byte[]
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
   Please refer to Mockito FAQ on limitations of concurrency testing.
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies - 
   - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.
   - ```