Fixed benchmark default logging unit test for Spring boot 3 configuration

[kushagraThapar]

• Because of Spring boot 3 configs, default logging level are different than what this unit test is configured for.
• Fixed the unit test to check for default logging in slf4j-api -

<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>2.0.13</version>

Failing test pipeline -> https://dev.azure.com/azure-sdk/public/_build/results?buildId=3931044&view=ms.vss-test-web.build-test-results-tab&runId=48613480&resultId=100000&paneView=debug

[trande4884]

LGTM

[moarychan]

Thanks! Cherry-picked to 87a98f0 in PR #40700

[kushagraThapar]

Closing this PR as the commit has been cherry picked in another PR.