Apply configured IIR filter setting in generated BMP280 code

[murrayma]

This should match what's done in the similar BME280.

What does this implement/fix?

The Bosch BMP280 and BME280 are very similar parts and both feature an optional IIR filter. This works properly for the BME280, but the configuration options were being silently ignored in the generated code for the BMP280. This corrects that.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes
esphome/issues#1695

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040

Example entry for config.yaml:

# Example config.yaml

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.