[main] Port `InternalLoggerRegistry` from `2.x` (#3418 and #3681 ports) (#4157)

* Port `InternalLoggerRegistry` from `2.x`

Minimizes lock usage by moving logger instantiation outside the write lock (PR #3418). Adds stale entry detection via ReferenceQueue (PR #3681).

Signed-off-by: Vasily Pelikh <2010720+vpelikh@users.noreply.github.com>

* Apply spotless formatting to InternalLoggerRegistryTest

* Fix InternalLoggerRegistry null-MessageFactory lookup mismatch in Log4j 3

InternalLoggerRegistry.getLogger(name, null) normalized null to a hardcoded ParameterizedMessageFactory.INSTANCE, but LoggerContext stored loggers under its DI-injected defaultMessageFactory (ReusableMessageFactory in Log4j 3). This store-key/get-key mismatch caused testGetLoggerRetrievesExistingLogger, testHasLoggerReturnsCorrectStatus, and testExpungeStaleWeakReferenceEntries to all fail.

- InternalLoggerRegistry: constructor-inject defaultMessageFactory (final field), resolve null→defaultMessageFactory instead of hardcoded INSTANCE.
- LoggerContext: construct InternalLoggerRegistry with its own defaultMessageFactory after DI resolution.
- Test: iterate all message-factory buckets (.values()) instead of assuming ParameterizedMessageFactory.INSTANCE.

* InternalLoggerRegistry: add Javadoc, align with 2.x naming, fix return-in-finally, add expungeStaleEntries

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Signed-off-by: Vasily Pelikh <2010720+vpelikh@users.noreply.github.com>