Expose support for toggle_action in Cover API

[felipecrs]

What does this implement/fix?

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)
• Code quality improvements to existing code or addition of tests
• Other

Related issue or feature (if applicable):

• refs ESPHome's cover_action does not get called by HA's cover.toggle home-assistant/core#135099
• refs Honor ESPHome's cover toggle_action home-assistant/core#135103
• refs Add support for cover toggle_action aioesphomeapi#1025

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx

Example entry for config.yaml:

cover:
  - platform: template
    name: Garage Door
    device_class: garage
    open_action:
      logger.log: open_action called
    close_action:
      logger.log: close_action called
    toggle_action:
      logger.log: toggle_action called

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.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.70%. Comparing base (4d8b5ed) to head (5e6c119).
Report is 1843 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #8049      +/-   ##
==========================================
- Coverage   53.70%   53.70%   -0.01%     
==========================================
  Files          50       50              
  Lines        9408     9840     +432     
  Branches     1654     1361     -293     
==========================================
+ Hits         5053     5285     +232     
- Misses       4056     4227     +171     
- Partials      299      328      +29     

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