Use typing.TYPE_CHECKING instead of STATICA_HACK

[bswck]

Fun fact, TYPE_CHECKING was released in mid 2016 and STATICA_HACK was first used here in late 2012.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.42%. Comparing base (a0175b0) to head (7f847da).

Files with missing lines	Patch %	Lines
kombu/__init__.py	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2239      +/-   ##
==========================================
- Coverage   81.50%   81.42%   -0.09%     
==========================================
  Files          77       77              
  Lines        9524     9532       +8     
  Branches     1152     1153       +1     
==========================================
- Hits         7763     7761       -2     
- Misses       1569     1578       +9     
- Partials      192      193       +1     

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[auvipy]

restarted the failing python 3.8 build

[bswck]

I'm kinda confused with the coverage drop.
I skipped the # pragma: no cover comment because of

kombu/pyproject.toml

Line 14 in a0175b0

"if TYPE_CHECKING:",

Oh, ok, it's just -0.08% diff. Most likely due to code size change.

[auvipy]

seems OK to me but may be we can defer it to 5.5.x release?