Fix dynamic table cpu burn #10472

[danielkec]

Fixes #10472

[Copilot]

Pull Request Overview

This PR refactors logging setup in the H2 specification tests and fixes a bug in the HTTP/2 dynamic table implementation.

• Switched from JUL to SLF4J logging framework in H2Spec tests
• Fixed HTTP/2 dynamic table eviction logic to prevent infinite loops and incorrect size tracking
• Added comprehensive test coverage for the dynamic table edge cases

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
tests/integration/h2spec/src/test/java/H2SpecIT.java	Updated copyright year, added Slf4jLogConsumer import, and replaced custom log consumer with Slf4jLogConsumer
tests/integration/h2spec/pom.xml	Replaced JUL-based logging dependencies with SLF4J equivalents (helidon-logging-slf4j and slf4j-simple)
http/http2/src/test/java/io/helidon/http/http2/DynamicTableTest.java	Added two new test cases to verify dynamic table behavior when only one or two headers fit in the table
http/http2/src/main/java/io/helidon/http/http2/Http2Headers.java	Fixed eviction logic by reordering operations, improving the condition check, and ensuring currentTableSize is reset when headers list is empty

Comments suppressed due to low confidence (1)

http/http2/src/test/java/io/helidon/http/http2/DynamicTableTest.java:19

• The import java.nio.charset.StandardCharsets is added but not used in any of the new test methods. This import should be removed unless it's needed elsewhere in the file.

import io.helidon.http.HeaderNames;

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