[CHA-0] Fix failing tests on CI

[shaljam]

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Description of the pull request

[Copilot]

Pull Request Overview

This pull request fixes failing tests on CI by updating the test configuration and preparing a clean user state before test execution.

• Refactors the moderation test to use a variable for the blocklist name rather than a hard-coded string.
• Adds a new method in BasicTest to clean up users before tests run.

Reviewed Changes

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

File	Description
src/test/java/io/getstream/chat/java/ModerationTest.java	Updates moderation config test to use a variable, ensuring consistency with the configuration.
src/test/java/io/getstream/chat/java/BasicTest.java	Introduces cleanUsers() to delete users before tests, supporting a fresh test environment.

Comments suppressed due to low confidence (1)

src/test/java/io/getstream/chat/java/ModerationTest.java:15

• [nitpick] Typo in the method name: 'Gettting' should be corrected to 'Getting' for clarity.

void whenUpsertingGetttingDeletingModerationConfig_thenNoException() {