Add build test to check all schemas are valid Avram

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Avram Schemas can be checked with avram -s $file with avram-js. This issue requires to make all existing schema files valid Avram.

• [x] #405 (not finished yet)
• [x] src/{main,test}/resources/unimarc/avram-unimarc.json #408
• [x] cleanup src/main/resources/marc-schema.json (this differs from marc-schema/marc-schema.json but not sure where it is used at all): #450
• [x] src/main/resources/marc/authority-schema.avram.json (requires https://github.com/timathom/marc-schema/pull/12 and possibly more cleanup)
• [ ] remove src/main/resources/marc/authority-schema.yale.json and close #373
• [x] cleanup PICA schemas
  • [x] src/main/resources/pica-schema.json (should be removed?)
  • [x] remove src/main/resources/pica/avram-k10plus.json, use avram-k10plus-title.json instead
  • [x] src/main/resources/pica/avram-k10plus-title.json (required fix in https://format.k10plus.de/avram.pl)
• [x] src/test/resources/pica/schema/pica-schema-extra.json
• [x] src/test/resources/pica/schema/pica-schema.json (should be equal to one of the pica schema files above)

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Requires only #450 and #373 to be finished (both seem to be outdated files).