Patch to work with latest OG-Core

[jdebacker]

This PR patches OG-IND to work with the latest OG-Core release.

To do this, references to surv_rate are removed and rho is made into a 2-dimensional object.

Note: tests will not pass until OG-USA is updated via this PR.

[codecov-commenter]

Codecov Report

Attention: 50 lines in your changes are missing coverage. Please review.

Comparison is base (0281937) 80.32% compared to head (b9902d8) 80.31%.
Report is 19 commits behind head on main.

Files	Patch %	Lines
ogind/calibrate.py	4.87%	39 Missing ⚠️
ogind/tests/test_get_micro_data.py	89.36%	5 Missing ⚠️
ogind/income.py	85.71%	3 Missing ⚠️
ogind/demographics.py	80.00%	2 Missing ⚠️
ogind/get_micro_data.py	98.24%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #20      +/-   ##
==========================================
- Coverage   80.32%   80.31%   -0.01%     
==========================================
  Files           9       13       +4     
  Lines         681      696      +15     
==========================================
+ Hits          547      559      +12     
- Misses        134      137       +3     

Flag	Coverage Δ
unittests	80.31% <74.74%> (-0.01%)	⬇️

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[rickecon]

Thanks @jdebacker. This looks great. Merging.