Change from glue.datafind to use gwdatafind

[eagoetz]

Uses this helpful migration note: https://gwdatafind.readthedocs.io/en/stable/migrating/#simplified-single-calls

[codecov[bot]]

Codecov Report

Merging #357 (b28bb91) into master (7e3ced3) will increase coverage by 0.80%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #357      +/-   ##
==========================================
+ Coverage   49.49%   50.29%   +0.80%     
==========================================
  Files          57       60       +3     
  Lines        8428     8664     +236     
==========================================
+ Hits         4171     4357     +186     
- Misses       4257     4307      +50     

Flag	Coverage Δ
Linux	50.29% <0.00%> (+0.80%)	:arrow_up:
python3.10	50.29% <0.00%> (+0.80%)	:arrow_up:
python3.7	49.48% <0.00%> (+0.83%)	:arrow_up:
python3.8	50.29% <0.00%> (+0.80%)	:arrow_up:
python3.9	50.29% <0.00%> (+0.80%)	:arrow_up:

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

Impacted Files	Coverage Δ
gwsumm/plot/sei.py	23.86% <0.00%> (+0.27%)	:arrow_up:
gwsumm/utils.py	98.67% <0.00%> (ø)
gwsumm/segments.py	67.95% <0.00%> (ø)
gwsumm/__init__.py	100.00% <0.00%> (ø)

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