ssl: Add brainpool for TLS-1.3

[IngelaAndin]

Add support brainpool elliptic curves in TLS-1.3

[github-actions]

CT Test Results

    2 files     67 suites   48m 20s ⏱️
  787 tests   743 ✅  44 💤 0 ❌
3 758 runs  2 964 ✅ 794 💤 0 ❌

Results for commit 6801f0f.

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// Erlang/OTP Github Action Bot

[IngelaAndin]

I think the strongest argument for deprecating prf, is that it is confusing in many ways for the user. It has legacy name that most people do not understand. It has confusing arguments that can fool you into using something that does not fulfill exporter guarantees. SSL/TLS is hard enough without these sources of confusion.

[IngelaAndin]

I will redo this when #8169 has been merged. Maybe we can keep ecc function with new doc and not document ec_curves.