feat(mbedtls): Add configuration to control dynamic buffer strategy in mbedtls

Problem:
1. In low-memory scenarios, the dynamic buffer feature can fail due to memory fragmentation.
2. It requires a contiguous 16KB heap chunk, but continuous allocation and deallocation of
the RX buffer can lead to fragmentation.
3. If another component allocates memory between these operations, it can break up the
available 16KB block, causing allocation failure.

Solution:
1. Introduce configurable strategy for using dynamic buffers in TLS connections.
2. For example, convert RX buffers to static after the TLS handshake.
3. Allow users to select the strategy via a new field in the esp_http_client_cfg_t structure.
4. The strategy can be controlled independently for each TLS session.

components/tcp_transport/include/esp_transport_ssl.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -61,6 +61,15 @@ void esp_transport_ssl_crt_bundle_attach(esp_transport_handle_t t, esp_err_t ((*
  */
 void esp_transport_ssl_enable_global_ca_store(esp_transport_handle_t t);
 
+#if CONFIG_MBEDTLS_DYNAMIC_BUFFER
+/**
+ * @brief      Set ESP-TLS dynamic buffer strategy for ESP-TLS connection
+ *
+ * @param      t    ssl transport
+ * @param[in]  strategy      ESP-TLS dynamic buffer strategy
+ */
+void esp_transport_ssl_set_esp_tls_dyn_buf_strategy(esp_transport_handle_t t, esp_tls_dyn_buf_strategy_t strategy);
+#endif
 /**
  * @brief      Set TLS protocol version for ESP-TLS connection
  *