fix(bt/controller): fixed some controller bugs on ESP32.

    1. added a VSC to control whether to initiate lmp_auto_rate
        - Closes #15133
    2. fixed EA resource cleanup error after SNIFF negotiation failure
        - Closes #13605
    3. removed an assertion in SCO data TX handler after disconnection
        - Closes #15176

Author: BetterJincheng

components/bt/controller/lib_esp32

@@ -663,6 +663,7 @@ PROVIDE ( ld_acl_rsw_frm_cbk = 0x40033bb0 );
 PROVIDE ( ld_sco_modify = 0x40031778 );
 PROVIDE ( lm_cmd_cmp_send = 0x40051838 );
 PROVIDE ( ld_sco_frm_cbk = 0x400349dc );
+PROVIDE ( ld_sco_evt_start_cbk = 0x40031afc );
 PROVIDE ( ld_sco_evt_stop_cbk = 0x40031d78 );
 PROVIDE ( ld_acl_rsw_evt_start_cbk = 0x40031154 );
 PROVIDE ( ld_acl_sco_rsvd_check = 0x4002fa94 );