change(esp-tls): Improve support for wolfssl (IDFGH-15505)

[gojimmypi]

Description

Improves support for wolfSSL in the ESP-IDF esp-tls component.

I realize that v5.5 is already in beta1 as of a few days ago. I'm hopeful that this update can be included.

Works best with wolfSSL v5.7.6 or later; v5.7.8 is better, more polish coming to master branch.

The wolfssl source code can also be set via WOLFSSL_ROOT via environment variable, cmake variable, or idf.py menuconfig.

See ESP Registry for wolfssl and other components in the wolfssl namespace.

For getting started, see:

• YouTube: Getting Started with wolfSSL for Espressif ESP32
• YouTube DevCon24 - Getting Started with wolfSSL encryption
• Blog: wolfSSL now available in Espressif Component Registry
• Other Espressif resources at wolfSSL
• wolfSSL Documentation
• wolfssl Espressif examples

Related

Recent esp-tls specific changes to wolfSSL:

• Add wolfSSL esp-tls and Certificate Bundle Support wolfSSL/wolfssl#7936
• Improve PlatformIO Certificate Bundle Support wolfSSL/wolfssl#8847

Overview:

• Improving wolfSSL integration with the Espressif ESP-IDF (IDFGH-13019) #13966
• Improving wolfSSL integration with the Espressif ESP-IDF wolfSSL/wolfssl#7640
• ESP32 Espressif Improvements - Roadmap Summary wolfSSL/wolfssl#6234

Also:

• Espressif Managed Component wolfSSL 5.7.4 post-release update wolfSSL/wolfssl#8251
• Introduce WOLFSSL_ASN_ALLOW_0_SERIAL wolfSSL/wolfssl#7893
• Tidy up Espressif ESP32 test and benchmark examples wolfSSL/wolfssl#5800

Testing

Tested with my slightly revised esp_http_client_example.

Note the problem references in:

• Example esp_http_client postman-echo example fails (IDFGH-15491) #16132
• The howsmyssl site does not fully support TLS 1.3 (IDFGH-13611) #14496

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