RFR: 8353578: Refactor existing usage of internal HKDF impl to use the KDF API

[Daniel Jeliński]

On Wed, 2 Apr 2025 21:43:19 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

> This PR removes the internal JSSE HKDF impl and changes to use the KDF API for the HKDF support from JCA/JCE providers.
> 
> This is just code refactoring. Known-answer regression test for the internal JSSE HKDF impl is removed as the test vectors are already covered by the HKDF impl in SunJCE provider.
> 
> Thanks in advance for the review~

LGTM. Thanks!

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Marked as reviewed by djelinski (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24393#pullrequestreview-2738901455