Resolve package cycle between `mapping` and `convert` introduced by property-based converters

[mp911de]

See #2566

15:05:36  output = degraph-across-modules.graphml
15:05:36  constraints = no cycles
15:05:36  } yields the following constraint violations: [sub-modules](no cycles):
15:05:36      mapping.model -> convert
15:05:36      mapping -> convert
15:05:36      convert -> mapping.context
15:05:36      convert -> mapping
15:05:36      mapping.context -> mapping.model
15:05:36  [Package](no cycles):
15:05:36      org.springframework.data.mapping.model -> org.springframework.data.convert
15:05:36      org.springframework.data.mapping.context -> org.springframework.data.mapping.model
15:05:36      org.springframework.data.convert -> org.springframework.data.mapping
15:05:36      org.springframework.data.convert -> org.springframework.data.mapping.context
15:05:36      org.springframework.data.mapping -> org.springframework.data.convert