Fix: prevent duplicate uploads of single packings

[rugeli]

Problem

What is the problem this work solves, including
When "save_analyze_result" is set to True in the config file, a single packing recipe will be uploaded twice

What I/we did to solve this problem
In Analysis.py at L2490, we made an update to the doloop function to call save_as_simularium only when number_of_packings > 1

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Steps to Verify:

1. pack -r examples/recipes/v2/one_sphere.json -c examples/packing-configs/debug.json

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6ba5a46) 98.63% compared to head (e3e08ed) 98.63%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #223   +/-   ##
=======================================
  Coverage   98.63%   98.63%           
=======================================
  Files          18       18           
  Lines         511      511           
=======================================
  Hits          504      504           
  Misses          7        7           

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[github-actions]

Packing analysis report

Analysis for packing results located at cellpack/tests/outputs/test_spheres/spheresSST

Ingredient name	Encapsulating radius	Average number packed
ext_A	25	236.0

Packing image

Distance analysis

Expected minimum distance: 50.00
Actual minimum distance: 50.01

Ingredient key	Pairwise distance distribution
ext_A

[mogres]

LGTM!