Fix autodoc: missing type annotation for variadic and keyword parameters (refs: #6574)

[tk0miya]

Feature or Bugfix

• Bugfix

Purpose

• refs: Autodoc issues: bad ordering, missing hyperlinks, missing type information #6574

[codecov]

Codecov Report

Merging #6576 into 2.0 will increase coverage by <.01%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##              2.0    #6576      +/-   ##
==========================================
+ Coverage   83.73%   83.73%   +<.01%     
==========================================
  Files         271      271              
  Lines       40966    40977      +11     
  Branches     5999     6001       +2     
==========================================
+ Hits        34304    34314      +10     
- Misses       5334     5335       +1     
  Partials     1328     1328

Impacted Files	Coverage Δ
tests/test_util_inspect.py	92.83% <100%> (+0.04%)	⬆️
sphinx/util/inspect.py	72.94% <100%> (+0.51%)	⬆️
tests/typing_test_data.py	59.25% <50%> (-0.36%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 04fbd51...b436760. Read the comment docs.