Feature: 优先使用 Annotated 的最后一个子依赖

[ProgramRipper]

当前的 Annotated 子依赖支持优先使用 metadata 中的第一个子依赖。

此 PR 将行为更改成优先使用 metadata 中的最后一个子依赖。
借助嵌套 Annotated 会被展平，metadata 顺序由最内层向外的特性（assert Annotated[Annotated[int, ValueRange(3, 10)], ctype("char")] == Annotated[int, ValueRange(3, 10), ctype("char")]），可以实现 Annotated 子依赖的复用：

假设上游提供一个 User 子依赖

User = Annotated[_User, _get_user]

# Usage:
@handler.handle()
async def _(user: User):
    ...

在下游，可以重写 User 的依赖注入逻辑，而复用 User 的类型标注：

CustomUser = Annotated[User, _custom_get_user()]

# Usage:
@handler.handle()
async def _(user: CustomUser):
    ...

参见：

• Feature: 为子依赖添加 PEP593 Annotated 支持 #1832
• https://docs.python.org/3/library/typing.html#typing.Annotated

[codecov]

Codecov Report

Merging #2360 (8b2e4cf) into master (005968a) will increase coverage by 0.03%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2360      +/-   ##
==========================================
+ Coverage   90.77%   90.81%   +0.03%     
==========================================
  Files          46       46              
  Lines        3424     3428       +4     
==========================================
+ Hits         3108     3113       +5     
+ Misses        316      315       -1     

Flag	Coverage Δ
unittests	90.81% <100.00%> (+0.03%)	⬆️

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

Files Changed	Coverage Δ
nonebot/internal/params.py	98.92% <100.00%> (ø)

... and 3 files with indirect coverage changes

[github-actions]

🚀 Deployed on https://deploy-preview-2360--nonebot2.netlify.app

[mnixry]

LGTM