GH26013 Fix type annotations in pandas/tseries/*

[gwrome]

• closes Fix type annotations in pandas.tseries.* #26013
• tests passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• [ ] whatsnew entry

Part of #25882

[codecov]

Codecov Report

Merging #26014 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26014      +/-   ##
==========================================
- Coverage   91.82%   91.81%   -0.01%     
==========================================
  Files         175      175              
  Lines       52551    52554       +3     
==========================================
- Hits        48256    48255       -1     
- Misses       4295     4299       +4

Flag	Coverage Δ
#multiple	90.38% <100%> (ø)	⬆️
#single	40.72% <100%> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/tseries/frequencies.py	97.69% <100%> (ø)	⬆️
pandas/tseries/offsets.py	96.69% <100%> (ø)	⬆️
pandas/tseries/holiday.py	93.2% <100%> (+0.03%)	⬆️
pandas/io/gbq.py	75% <0%> (-12.5%)	⬇️
pandas/core/frame.py	96.79% <0%> (-0.12%)	⬇️

---

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[codecov]

Codecov Report

Merging #26014 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26014      +/-   ##
==========================================
- Coverage   91.82%   91.81%   -0.01%     
==========================================
  Files         175      175              
  Lines       52551    52554       +3     
==========================================
- Hits        48256    48255       -1     
- Misses       4295     4299       +4

Flag	Coverage Δ
#multiple	90.38% <100%> (ø)	⬆️
#single	40.72% <100%> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/tseries/frequencies.py	97.69% <100%> (ø)	⬆️
pandas/tseries/offsets.py	96.69% <100%> (ø)	⬆️
pandas/tseries/holiday.py	93.2% <100%> (+0.03%)	⬆️
pandas/io/gbq.py	75% <0%> (-12.5%)	⬇️
pandas/core/frame.py	96.79% <0%> (-0.12%)	⬇️

---

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 a1fee91...49db28c. Read the comment docs.

[jreback]

lgtm. @WillAyd

[WillAyd]

Thanks @gwrome !