Add filtering attributes by collection

[maarcingebala]

Fixes #3507

Pull Request Checklist

1. Privileged views and APIs are guarded by proper permission checks.
2. All visible strings are translated with proper context.
3. All data-formatting is locale-aware (dates, numbers, and so on).
4. Database queries are optimized and the number of queries is constant.
5. Database migration files are up to date.
6. The changes are tested.
7. The code is documented (docstrings, project documentation).
8. GraphQL schema and type definitions are up to date.
9. Changes are mentioned in the changelog.

[codecov]

Codecov Report

Merging #3508 into master will decrease coverage by 0.01%.
The diff coverage is 72.22%.

@@            Coverage Diff             @@
##           master    #3508      +/-   ##
==========================================
- Coverage   89.89%   89.87%   -0.02%     
==========================================
  Files         241      241              
  Lines       13109    13119      +10     
  Branches     1323     1324       +1     
==========================================
+ Hits        11784    11791       +7     
- Misses        921      923       +2     
- Partials      404      405       +1

Impacted Files	Coverage Δ
saleor/graphql/product/schema.py	100% <100%> (ø)	⬆️
saleor/graphql/product/resolvers.py	92.04% <66.66%> (-2.9%)	⬇️

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