Move to use improv lib from platformio (#2741)

esphome/components/improv_serial/__init__.py

@@ -5,7 +5,6 @@ import esphome.final_validate as fv
 
 CODEOWNERS = ["@esphome/core"]
 DEPENDENCIES = ["logger", "wifi"]
-AUTO_LOAD = ["improv"]
 
 improv_serial_ns = cg.esphome_ns.namespace("improv_serial")
 
@@ -31,3 +30,4 @@ FINAL_VALIDATE_SCHEMA = validate_logger_baud_rate
 async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
+    cg.add_library("esphome/Improv", "1.0.0")