Purpose

Fix for #4514 - Consolidate sticker set tests to use mixed format sticker sets

Description

This PR refactors the sticker set tests in tests/_files/test_sticker.py to simplify and consolidate the test logic. Instead of maintaining separate sticker sets for static, animated, and video formats, the tests now use a single mixed format sticker set that contains stickers in all three formats.

Changes Made

Key Improvements

• Simplified test setup: Consolidated three separate sticker sets (static, animated, video) into one mixed format sticker set
• Reduced API calls: Tests now create and manage a single sticker set instead of three separate ones, reducing Telegram API load
• Better test organization: Renamed test methods to reflect their actual purpose (e.g., test_bot_methods_1_png → test_bot_methods_1_add_stickers)
• Improved code clarity: Added descriptive docstrings to test methods explaining what each test validates
• Consistent formatting: Applied consistent code formatting and parameter naming throughout

Test Methods Consolidated

• test_bot_methods_1_png, test_bot_methods_1_tgs, test_bot_methods_1_webm → test_bot_methods_1_add_stickers
• test_bot_methods_2_png, test_bot_methods_2_tgs, test_bot_methods_2_webm → test_bot_methods_2_position
• test_bot_methods_3_png, test_bot_methods_3_tgs, test_bot_methods_3_webm → test_bot_methods_3_thumbnail + test_bot_methods_3_webm_thumbnail
• test_bot_methods_4_png, test_bot_methods_4_tgs, test_bot_methods_4_webm → test_bot_methods_4_delete
• test_bot_methods_5_png, test_bot_methods_5_tgs, test_bot_methods_5_webm → test_bot_methods_5_emoji
• test_bot_methods_6_png, test_bot_methods_6_tgs, test_bot_methods_6_webm → test_bot_methods_6_title
• test_bot_methods_7_png, test_bot_methods_7_tgs, test_bot_methods_7_webm → test_bot_methods_7_keywords
• test_bot_methods_8_png → test_bot_methods_8_replace

Updated Fixtures

• Modified test_create_sticker_set to create a single mixed sticker set with static, animated, and video formats
• Updated test_delete_sticker_set to include both static and animated sticker formats
• Updated test_set_custom_emoji_sticker_set_thumbnail to include video sticker format
• Updated test_create_new_mask_sticker_set with descriptive docstring
• Updated test_set_sticker_mask_position with descriptive docstring

Files Changed

• tests/_files/test_sticker.py: Consolidated test methods and updated sticker set fixtures

Testing

• All existing tests remain functionally equivalent and should continue to pass
• Tests now use fewer API resources by consolidating sticker set creation
• Test logic is clearer with improved docstrings and method naming

Checklist

• Code changes are compatible with Python 3.9 to 3.14
• Tests have been created or updated
• Code is properly documented with clear docstrings
• No breaking changes to public API (test-only changes)
• Pre-commit checks pass

Related Issue

Closes #4514