Create a TileFetcher-based constructor for ImageStack

[ttung]

1. Add a parser from TileFetcher to the TileCollectionData.
2. Add a top-level classmethod to wrap a TileFetcher and produce an ImageStack.
3. Add a test to verify this functionality.

Test plan: Tests pass.

Fixes: #1603
Depends on #1736, #1738

[codecov-io]

Codecov Report

Merging #1737 into master will increase coverage by 0.02%.
The diff coverage is 92.39%.

@@            Coverage Diff             @@
##           master    #1737      +/-   ##
==========================================
+ Coverage   90.07%   90.09%   +0.02%     
==========================================
  Files         248      251       +3     
  Lines        9168     9260      +92     
==========================================
+ Hits         8258     8343      +85     
- Misses        910      917       +7

Impacted Files	Coverage Δ
...ish/core/imagestack/parser/tilefetcher/__init__.py	100% <100%> (ø)
...fish/core/imagestack/test/test_from_tilefetcher.py	100% <100%> (ø)
starfish/core/imagestack/imagestack.py	92.83% <87.5%> (-0.13%)	⬇️
...fish/core/imagestack/parser/tilefetcher/_parser.py	90.47% <90.47%> (ø)

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