https_server: Fix example when `MBEDTLS_DYNAMIC_BUFFER` is enabled

- While checking if ciphersuite uses RSA key exchange methods,
  the APIs `mbedtls_ssl_get_ciphersuite_id_from_ssl` and
  `mbedtls_ssl_ciphersuite_from_id` were used to get the ciphersuite
  info.
- However, this is incorrect as we need the ciphersuite info from the
  handshake instance and not the ssl_session instance.

.gitlab/ci/rules.yml

@@ -219,6 +219,7 @@
   - "components/esp_wifi/**/*"
   - "components/esp_netif/**/*"
   - "components/lwip/**/*"
+  - "components/mbedtls/port/dynamic/*"
 
   # for cases with wifi_high_traffic marker
   - "examples/system/ota/**/*"

components/mbedtls/port/dynamic/esp_ssl_srv.c

@@ -18,8 +18,8 @@ static const char *TAG = "SSL Server";
  */
 static bool ssl_ciphersuite_uses_rsa_key_ex(mbedtls_ssl_context *ssl)
 {
-    int suite_id = mbedtls_ssl_get_ciphersuite_id_from_ssl(ssl);
-    const mbedtls_ssl_ciphersuite_t *ciphersuite_info = mbedtls_ssl_ciphersuite_from_id(suite_id);
+    const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+        ssl->MBEDTLS_PRIVATE(handshake)->ciphersuite_info;
 
     if (ciphersuite_info->MBEDTLS_PRIVATE(key_exchange) == MBEDTLS_KEY_EXCHANGE_RSA ||
         ciphersuite_info->MBEDTLS_PRIVATE(key_exchange) == MBEDTLS_KEY_EXCHANGE_RSA_PSK) {