[openssl/openssl] 6962e2: Fix a lock in provider_remove_store_methods()

[Matt Caswell]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 6962e21b7c51480343db1a275f52525754dcbe44
      https://github.com/openssl/openssl/commit/6962e21b7c51480343db1a275f52525754dcbe44
  Author: Matt Caswell <matt at openssl.org>
  Date:   2022-10-25 (Tue, 25 Oct 2022)

  Changed paths:
    M crypto/provider_core.c

  Log Message:
  -----------
  Fix a lock in provider_remove_store_methods()

We were taking a read lock. It should have been a write lock.

Fixes #19474

Reviewed-by: Tim Hudson <tjh at openssl.org>
Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19481)