[openssl/openssl] a9e610: Add decoder fuzzer

[Kurt Roeckx]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: a9e6100bc98439ca787aa1fce541550ad1ff3e84
      https://github.com/openssl/openssl/commit/a9e6100bc98439ca787aa1fce541550ad1ff3e84
  Author: Kurt Roeckx <kurt at roeckx.be>
  Date:   2023-06-23 (Fri, 23 Jun 2023)

  Changed paths:
    M fuzz/build.info
    A fuzz/decoder.c
    A test/recipes/99-test_fuzz_decoder.t

  Log Message:
  -----------
  Add decoder fuzzer

This found CVE-2023-0217

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Matt Caswell <matt at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20269)