Rename RBP to 'product_category'

[pylipp]

More precise naming matching the model name (ProductCategory)

• ✔️ Auth0 actions updated for dev, staging, and production tenants
• ✔️ RBP google sheet updated

[pylipp]

Rename RBP to product_category

[codecov]

Codecov Report

Merging #1091 (54a3a58) into master (cdd2d5d) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1091      +/-   ##
==========================================
- Coverage   71.73%   71.72%   -0.01%     
==========================================
  Files         290      290              
  Lines        7440     7438       -2     
  Branches     1567     1566       -1     
==========================================
- Hits         5337     5335       -2     
  Misses       2060     2060              
  Partials       43       43              

Flag	Coverage Δ
backend	96.94% <100.00%> (-0.01%)	⬇️
frontend	51.50% <ø> (ø)

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Files	Coverage Δ
back/boxtribute_server/authz.py	97.36% <ø> (ø)
...er/business_logic/core/product_category/queries.py	100.00% <100.00%> (ø)
back/boxtribute_server/graph_ql/loaders.py	100.00% <ø> (ø)