[openssl/openssl] 18a355: Add FIPS build instructions

[Shane]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: 18a3551cd6ef4ec0ee816c9265e4361c8968f062
      https://github.com/openssl/openssl/commit/18a3551cd6ef4ec0ee816c9265e4361c8968f062
  Author: slontis <shane.lontis at oracle.com>
  Date:   2023-07-14 (Fri, 14 Jul 2023)

  Changed paths:
    M README-FIPS.md
    M doc/man7/fips_module.pod

  Log Message:
  -----------
  Add FIPS build instructions

If you are building the latest release source code with enable-fips configured
then the FIPS provider you are using is not likely to be FIPS compliant.

This update demonstrates how to build a FIPS provider that is compliant
and use it with the latest source code.

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20907)

(cherry picked from commit 2b42290f08c0a75695021aeb7d5cd16068b3edc3)