validated SDK update, full integration delayed since:

- it increases firmware size without obvious reason (might me compiler or new features)
- it does not bring any benefit (like UDP DTLS)

validation(successfull compilation) was done with code saved on similat tag of firmware repo

Merge branch 'bugfix/fix_rf_state_error_when_scan_again_in_scan_cb' i…

…nto 'master'

fix(lib): fix rf state error when scan again in scan cb

See merge request sdk/ESP8266_RTOS_SDK!1588

Merge branch 'bugfix/fix_rf_state_error_when_scan_again_in_scan_cb' i…

…nto 'master'

fix(lib): fix rf state error when scan again in scan cb

See merge request sdk/ESP8266_RTOS_SDK!1588

Merge branch 'bugfix/remove_i2s_bbpll_clk_enable_v3.3' into 'release/…

…v3.3'

bugfix(i2s): remove_i2s_bbpll_clk_enable(backport v3.3)

See merge request sdk/ESP8266_RTOS_SDK!1425

Merge branch 'feature/update_ssc_library_v3.1' into 'release/v3.1'

feat(ssc): update ssc library

See merge request sdk/ESP8266_RTOS_SDK!1395

Merge branch 'bugfix/support_GD25Q64_qio_enable_v3.3' into 'release/v…

…3.3'

bugfix(flash): add support for GD25Q64 qio enable (backport v3.3)

See merge request sdk/ESP8266_RTOS_SDK!1241

Merge branch 'feature/ets_printf_add_%%' into 'master'

esp8266: ets_printf supports format "%%"

See merge request sdk/ESP8266_RTOS_SDK!1204

Merge branch 'bugfix/fix_wdt_rst_when_pp_soft_wdt_stop_called' into '…

…release/v3.1'

fix(esp8266): fix wdt rst when pp soft wdt stop is called

See merge request sdk/ESP8266_RTOS_SDK!1205

Merge branch 'bugfix/fix_disconnect_cb_error' into 'release/v2.1'

fix(lib): fix disconnect cb error

See merge request sdk/ESP8266_RTOS_SDK!1198

Merge branch 'bugfix/fix_pthread_for_cpp' into 'master'

newlib: fix pthread macro lack for cpp

See merge request sdk/ESP8266_RTOS_SDK!988