Cleanup parmest

[smartin71]

Fixes # .

Updated examples/tests pandas code using .iloc[0] to avoid future deprecation warning.
Updated call back functions in examples to avoid errors for different types of data (pandas dataframes, dict, file lists).
Updated graphics.py to avoid matplotlib deprecation warning.

Summary/Motivation:

Changes proposed in this PR:

Legal Acknowledgement

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1. I agree my contributions are submitted under the BSD license.
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[smartin71]

Bethany Nicholson requested this PR. I am not sure how to add reviewers.

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (00e9324) 87.87% compared to head (a79912c) 87.86%.
Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3028      +/-   ##
==========================================
- Coverage   87.87%   87.86%   -0.01%     
==========================================
  Files         769      769              
  Lines       89522    89537      +15     
==========================================
+ Hits        78668    78675       +7     
- Misses      10854    10862       +8     

Flag	Coverage Δ
linux	85.19% <78.65%> (-0.01%)	⬇️
osx	74.99% <0.00%> (-0.02%)	⬇️
other	85.37% <78.65%> (-0.01%)	⬇️
win	82.42% <78.65%> (-0.01%)	⬇️

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

Files	Coverage Δ
...rmest/examples/reactor_design/bootstrap_example.py	94.73% <100.00%> (ø)
...parmest/examples/reactor_design/datarec_example.py	97.87% <100.00%> (ø)
...rmest/examples/reactor_design/leaveNout_example.py	97.56% <100.00%> (ø)
...xamples/reactor_design/likelihood_ratio_example.py	96.00% <100.00%> (ø)
...xamples/reactor_design/multisensor_data_example.py	94.44% <100.00%> (ø)
...les/reactor_design/parameter_estimation_example.py	96.00% <100.00%> (ø)
.../parmest/examples/reactor_design/reactor_design.py	92.68% <84.61%> (-4.29%)	⬇️
pyomo/contrib/parmest/graphics.py	86.34% <90.90%> (ø)
...mo/contrib/parmest/examples/semibatch/semibatch.py	94.44% <78.57%> (-4.10%)	⬇️

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