[core] Share conversion rate configuration constant (#19800)

esphome/components/const/__init__.py

@@ -15,6 +15,7 @@ CONF_CLIMATE_ID = "climate_id"
 CONF_CO2_EQUIVALENT = "co2_equivalent"
 CONF_COLOR_DEPTH = "color_depth"
 CONF_COLUMNS = "columns"
+CONF_CONVERSION_RATE = "conversion_rate"
 CONF_CRC_ENABLE = "crc_enable"
 CONF_DATA_BITS = "data_bits"
 CONF_DESCRIPTION = "description"

esphome/components/emc2101/__init__.py

@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import i2c
+from esphome.components.const import CONF_CONVERSION_RATE
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_INVERTED, CONF_RESOLUTION
 from esphome.types import ConfigType
@@ -13,7 +14,6 @@ MULTI_CONF = True
 CONF_PWM = "pwm"
 CONF_DIVIDER = "divider"
 CONF_DAC = "dac"
-CONF_CONVERSION_RATE = "conversion_rate"
 
 CONF_EMC2101_ID = "emc2101_id"
 

esphome/components/tmp1075/sensor.py

@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import i2c, sensor
+from esphome.components.const import CONF_CONVERSION_RATE
 import esphome.config_validation as cv
 from esphome.const import (
     DEVICE_CLASS_TEMPERATURE,
@@ -41,7 +42,6 @@ CONF_LIMIT_LOW = "limit_low"
 CONF_LIMIT_HIGH = "limit_high"
 CONF_FAULT_COUNT = "fault_count"
 CONF_POLARITY = "polarity"
-CONF_CONVERSION_RATE = "conversion_rate"
 CONF_FUNCTION = "function"
 
 CONFIG_SCHEMA = (