More extensive use of Polyester

[avik-pal]

• [x] Add Polyester approximate sparsity detection
• [x] Polyester colored AD

Tests were already present -- they just took the ForwardDiff fallback.

[codecov[bot]]

Codecov Report

Attention: 26 lines in your changes are missing coverage. Please review.

Comparison is base (01a5e5f) 85.25% compared to head (9fa3444) 84.34%.

Files	Patch %	Lines
ext/SparseDiffToolsPolyesterForwardDiffExt.jl	51.85%	13 Missing :warning:
ext/SparseDiffToolsPolyesterExt.jl	75.00%	11 Missing :warning:
src/highlevel/coloring.jl	66.66%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #285 +/- ## ========================================== - Coverage 85.25% 84.34% -0.91% ========================================== Files 23 24 +1 Lines 1404 1476 +72 ========================================== + Hits 1197 1245 +48 - Misses 207 231 +24 ```

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[avik-pal]

Holding off on the polyester version for in place version. Maybe someone more versed in polyester can get it working

[avik-pal]

cc @ChrisRackauckas

[avik-pal]

@ChrisRackauckas you will have to merge and register