Shorten LDBC rel table names

[mewim]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2e4fde9) 89.75% compared to head (157c13f) 89.71%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2248      +/-   ##
==========================================
- Coverage   89.75%   89.71%   -0.04%     
==========================================
  Files        1013     1014       +1     
  Lines       35845    35859      +14     
==========================================
- Hits        32172    32171       -1     
- Misses       3673     3688      +15     

see 7 files with indirect coverage changes

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