TLS13 code does not correctly call time function

[Taowyoo]

Summary

In:

mbedtls/library/ssl_tls13_client.c

Lines 1723 to 1725 in 1873d3b

	#if defined(MBEDTLS_HAVE_TIME)
	ssl->session_negotiate->start = time(NULL);
	#endif /* MBEDTLS_HAVE_TIME */

mbedtls/library/ssl_tls13_server.c

Lines 1787 to 1789 in 1873d3b

	#if defined(MBEDTLS_HAVE_TIME)
	ssl->session_negotiate->start = time(NULL);
	#endif /* MBEDTLS_HAVE_TIME */

Code need to call mbedtls_time to correctly handle the case if MBEDTLS_PLATFORM_TIME_MACRO is defined`

PR has been created for fixing this: #7639

System information

Mbed TLS version (3.4.0):
Operating system and version: Linux 5.15.0-72-generic #79~20.04.1-Ubuntu SMP Thu Apr 20 22:12:07 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Configuration (if not default, please attach mbedtls_config.h):
Compiler and options (if you used a pre-built binary, please indicate how you obtained it):
Additional environment information:

Expected behavior

Actual behavior

Steps to reproduce

Additional information