Enable more key exchange methods
Enable more key exchange methods

This is intended (but not entirely verified) to match our esp32 builds.
It does fix accessing https://circuitpython.org, which failed before with
"MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE".

It still doesn't work on a personal website of mine with valid letsencrypt
certificate but I haven't verified whether it works on esp32s2 with CP.
That site only allows TLS 1.3, while this mbedtls only supports up to
1.2.
The version of mbedtls we adopted based on micropython's use has no
TLS 1.3 support, but the one in espressif esp-idf does.

adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython