Reworked request builder

[JrooTJunior]

Description

Reworked request builder.

Simplified/unified internal mechanism how request data is passed to the HTTP endpoint.
The main change is removing build_request method from each API method and all special cases (files and global defaults) is resolved inside client session before sent request.

Also new global defaults is added to the bot instance, this properties works in the same way as global parse_mode:

• disable_web_page_preview
• protect_content

This change should not affect you if you are writing bots, but if you do a implementing HTTP session provider or uses session internals it can break your code (because it's internal mechanism and mostly should not be used from outside of framework internals)

Type of change

Please delete options that are not relevant.

• Internal improvements
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[github-actions]

✔️ Changelog found.

Thank you for adding a description of the changes

[codecov]

Codecov Report

Merging #1142 (10aff59) into dev-3.x (924a839) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           dev-3.x     #1142    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          354       354            
  Lines         9065      8791   -274     
==========================================
- Hits          9065      8791   -274     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
aiogram/client/bot.py	100.00% <100.00%> (ø)
aiogram/client/session/aiohttp.py	100.00% <100.00%> (ø)
aiogram/client/session/base.py	100.00% <100.00%> (ø)
aiogram/dispatcher/dispatcher.py	100.00% <100.00%> (ø)
aiogram/methods/add_sticker_to_set.py	100.00% <100.00%> (ø)
aiogram/methods/answer_callback_query.py	100.00% <100.00%> (ø)
aiogram/methods/answer_inline_query.py	100.00% <100.00%> (ø)
aiogram/methods/answer_pre_checkout_query.py	100.00% <100.00%> (ø)
aiogram/methods/answer_shipping_query.py	100.00% <100.00%> (ø)
aiogram/methods/answer_web_app_query.py	100.00% <100.00%> (ø)
... and 130 more