[venice-common] Add VeniceComponent to the PubSubAdminAdapterContext

[sofiaz11]

Problem Statement

Add VeniceComponent to the PubSubAdminAdapterContext

Solution

Code changes

• Added new code behind a config. If so list the config names and their default values in the PR description.
• Introduced new log lines.
• Confirmed if logs need to be rate limited to avoid excessive logging.

Concurrency-Specific Checks

Both reviewer and PR author to verify

• Code has no race conditions or thread safety issues.
• Proper synchronization mechanisms (e.g., synchronized, RWLock) are used where needed.
• No blocking calls inside critical sections that could lead to deadlocks or performance degradation.
• Verified thread-safe collections are used (e.g., ConcurrentHashMap, CopyOnWriteArrayList).
• Validated proper exception handling in multi-threaded code to avoid silent thread termination.

How was this PR tested?

• New unit tests added.
• New integration tests added.
• Modified or extended existing tests.
• Verified backward compatibility (if applicable).

Does this PR introduce any user-facing or breaking changes?

• No. You can skip the rest of this section.
• Yes. Clearly explain the behavior change and its impact.

[Copilot]

Pull Request Overview

This PR adds VeniceComponent to the PubSubAdminAdapterContext to enable proper component identification when creating PubSub admin adapters. The VeniceComponent field allows tracking which Venice component (Controller, Router, Server, etc.) is creating and using the admin adapter.

Key Changes

• Added VeniceComponent field to PubSubAdminAdapterContext with a default value of UNSPECIFIED
• Added getter and setter methods for VeniceComponent following the existing builder pattern
• Updated TopicManager to pass VeniceComponent from TopicManagerContext to PubSubAdminAdapterContext

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
internal/venice-common/src/main/java/com/linkedin/venice/pubsub/PubSubAdminAdapterContext.java	Added VeniceComponent field with getter/setter methods in builder pattern, defaulting to UNSPECIFIED
internal/venice-common/src/main/java/com/linkedin/venice/pubsub/manager/TopicManager.java	Updated to pass VeniceComponent from context when building PubSubAdminAdapterContext

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