H-3703: Remove unused data_type_constrains_values_on table

[TimDiekmann]

🌟 What is the purpose of this PR?

When I added support for Custom Data Types in the graph I added two reference tables:

• data_type_inherits_from
• data_type_constrains_values_on

The former is used for the allOf. The second one I added in advance because I assumed this is what we’re going to use for anyOf. However, we chose another route here. If we need it we can easily re-add it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 21.68%. Comparing base (7d56ea5) to head (d0cebf6).
Report is 30 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5766      +/-   ##
==========================================
- Coverage   21.93%   21.68%   -0.25%     
==========================================
  Files         552      552              
  Lines       18537    18659     +122     
  Branches     2651     2689      +38     
==========================================
- Hits         4066     4047      -19     
- Misses      14429    14570     +141     
  Partials       42       42              

Flag	Coverage Δ
apps.hash-ai-worker-ts	1.32% <ø> (-0.01%)	⬇️
apps.hash-api	1.16% <ø> (-0.01%)	⬇️
local.hash-backend-utils	8.80% <ø> (ø)
local.hash-graph-sdk	100.00% <ø> (ø)
local.hash-isomorphic-utils	1.03% <ø> (-0.02%)	⬇️
local.hash-subgraph	24.54% <ø> (ø)

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