openssl: import 3.5.3

This change adds OpenSSL 3.5.3 from upstream [1].

The 3.5.3 artifact was been verified via PGP key [2] and by SHA256 checksum [3].

This is a minor release with a single major bugfix to multithreading
support with OSSL_STORE_CTX.

More information about the release (from a high level) can be found in
the release notes [4].

1. https://github.com/openssl/openssl/releases/download/openssl-3.5.3/openssl-3.5.3.tar.gz
2. https://github.com/openssl/openssl/releases/download/openssl-3.5.3/openssl-3.5.3.tar.gz.asc
3. https://github.com/openssl/openssl/releases/download/openssl-3.5.3/openssl-3.5.3.tar.gz.sha256
4. https://github.com/openssl/openssl/blob/openssl-3.5.3/NEWS.md