feat(schema): Remove usage of migrated AvroSchemaUtils and HoodieAvroUtils methods (part 1)

[the-other-tim-brown]

Describe the issue this Pull Request addresses

Moves implementation of utils to HoodieSchemaUtils directly to remove the direct reliance on Avro.

Summary and Changelog

• Removes following from AvroSchemaUtils: findNestedField, appendFieldsToSchemaDedupNested, appendFieldsToSchema, pruneDataSchema, createNullableSchema, containsFieldInSchema
• Removes following from HoodieAvroUtils: createHoodieWriteSchema, addMetadataFields, isSchemaNull, removeMetadataFields, getRecordKeyPartitionPathSchema, addOperationToRecord, generateProjectionSchema, getNestedFieldSchemaFromRecord, getNullSchema
• The above are moved to HoodieSchemaUtils
• Tests are copied over if they do not already exist, otherwise they are simply removed

Impact

Breaks away from Avro schema usage

Risk Level

Low

Documentation Update

Contributor's checklist

• Read through contributor's guide
• Enough context is provided in the sections above
• Adequate tests were added if applicable

[hudi-bot]

CI report:

• 510f271 UNKNOWN
• a8ed0d5 Azure: SUCCESS

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