[openssl/openssl] aff2b7: Improve Malloc Failure Test

[Bernd Edlinger]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: aff2b761ba35778946ed521ac65ff4cb094c317f
      https://github.com/openssl/openssl/commit/aff2b761ba35778946ed521ac65ff4cb094c317f
  Author: Bernd Edlinger <bernd.edlinger at hotmail.de>
  Date:   2023-10-11 (Wed, 11 Oct 2023)

  Changed paths:
    M crypto/mem.c

  Log Message:
  -----------
  Improve Malloc Failure Test

Allow 2 digits after the comma in percentage in OPENSSL_MALLOC_FAILURES.
Add OPENSSL_MALLOC_SEED to allow for some randomization.

Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22127)

(cherry picked from commit 3df5736cf303d2c69654ba1c295a9772b738608e)