Add level synonyms to amount terms across all DOSDP patterns

- entity_attribute.tsv: add '{entity_name} level' synonym to all 675
  auto-generated rows (empty defined_class_name) where attribute is
  PATO:0000070 (amount) and entity_name is known in TSV
  (e.g. OBA:0002005 'external genitalia amount' gets synonym
  'external genitalia level'; OBA:0002009 'renal collecting system
  amount' gets 'renal collecting system level')

- process_attribute_location.yaml: add exact_synonyms data_list_var
  support (mirrors pattern used in other DOSDP patterns)

- process_attribute_location.tsv: add exact_synonyms column;
  OBA:2050069 'serum lipase activity amount' gets synonym
  'serum lipase activity level'

Agent-Logs-Url: https://github.com/obophenotype/bio-attribute-ontology/sessions/dbefd126-990d-42c1-bb50-ef1a0771238e

Co-authored-by: aleixpuigb <94959119+aleixpuigb@users.noreply.github.com>

Author: Copilot