Extended Debugger reductions and fixed some bugs

[NRauschmayr]

Description of changes:

Extended smdebug's reductions to check for nan- and inf-values and to compute quantiles for PT tensors. Tensors are now also written out in Tensorboard format such that users can display all reductions for a specific tensor within the same visualization and visualizations will be grouped by Debugger collections. Here is an example visualization:

Style and formatting:

I have run pre-commit install && pre-commit run --all-files to ensure that auto-formatting happens with every commit.

Issue number, if available

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[codecov-commenter]

Codecov Report

Merging #523 (66999aa) into master (b4dd4c1) will decrease coverage by 6.36%. The diff coverage is 57.44%.

@@            Coverage Diff             @@
##           master     #523      +/-   ##
==========================================
- Coverage   77.60%   71.24%   -6.37%     
==========================================
  Files         127      117      -10     
  Lines       11111    10614     -497     
==========================================
- Hits         8623     7562    -1061     
- Misses       2488     3052     +564     

Impacted Files	Coverage Δ
smdebug/pytorch/utils.py	48.14% <23.52%> (-32.81%)	:arrow_down:
smdebug/core/locations.py	85.71% <60.00%> (-5.96%)	:arrow_down:
smdebug/core/reduction_config.py	86.58% <77.77%> (-9.52%)	:arrow_down:
smdebug/core/hook.py	86.90% <81.25%> (-0.53%)	:arrow_down:
smdebug/mxnet/__init__.py	0.00% <0.00%> (-100.00%)	:arrow_down:
smdebug/mxnet/singleton_utils.py	0.00% <0.00%> (-100.00%)	:arrow_down:
...debug/profiler/analysis/notebook_utils/__init__.py	0.00% <0.00%> (-100.00%)	:arrow_down:
smdebug/mxnet/hook.py	0.00% <0.00%> (-84.85%)	:arrow_down:
smdebug/mxnet/utils.py	0.00% <0.00%> (-78.13%)	:arrow_down:
smdebug/rules/action/message_action.py	13.25% <0.00%> (-75.91%)	:arrow_down:
... and 61 more

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