Turn phyloseq from an Imports to a Suggests

[svteichman]

This pull request does several things:

-it adds new data, specifically the sample data, otu tables, and in some cases taxonomy tables, that make up phyloseq objects used for tests and the vignette -it removes all phyloseq objects from the data folder of the package -it updates all examples so that they run without phyloseq and without phyloseq data objects (for bbdml(), differentialTest(), and contrastsTest(), there are examples using phyloseq wrapped in \donotrun{} tags) -it takes all tests that use phyloseq and puts them into a single testing file, where the phyloseq objects are created from the dataframes stored in the package -it creates a new vignette that doesn't use phyloseq (with most of the same analyses as the original vignette that does use phyloseq)

[codecov-commenter]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (779de75) 94.12% compared to head (cfc6ba6) 93.36%.

:exclamation: Current head cfc6ba6 differs from pull request most recent head cc47207. Consider uploading reports for the commit cc47207 to get more accurate results

Files	Patch %	Lines
R/contrastsTest.R	35.71%	9 Missing :warning:
R/differentialTest.R	87.50%	3 Missing :warning:
R/clean_taxa_names.R	85.71%	1 Missing :warning:
R/convert_phylo.R	87.50%	1 Missing :warning:
R/otu_to_taxonomy.R	85.71%	1 Missing :warning:
R/warn_phyloseq.R	0.00%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #171 +/- ## ========================================== - Coverage 94.12% 93.36% -0.77% ========================================== Files 34 35 +1 Lines 1158 1176 +18 ========================================== + Hits 1090 1098 +8 - Misses 68 78 +10 ```

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