[TRACKING ISSUE] Move GenericRecord interfaces to its own package

[hz-devops-test]

The tracking issue for the Java side PR.

See hazelcast/hazelcast#21955 for details.

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The team decided to move the GenericRecord related interfaces
to its own package.

This PR moves the GenericRecord and GenericRecordBuilder interfaces
to the new serialization.genericrecord package.

[srknzl]

already done, see https://github.com/hazelcast/hazelcast-nodejs-client/tree/master/src/serialization