Refactor: Use Go Generics for RecordConfig processing #194

Job	Run time
integration-test-providers	7s
integration-tests (AXFRDDNS)	4m 8s
integration-tests (AXFRDDNS_DNSSEC)	1m 56s
integration-tests (AZURE_DNS)	9m 51s
integration-tests (BIND)	1m 36s
integration-tests (CLOUDFLAREAPI)	9m 30s
integration-tests (CNR)	8m 4s
integration-tests (DIGITALOCEAN)	4m 47s
integration-tests (GANDI_V5)	6m 1s
integration-tests (GCLOUD)	8m 11s
integration-tests (HEDNS)	11m 32s
integration-tests (MYTHICBEASTS)	11m 45s
integration-tests (HEXONET)	3m 19s
integration-tests (NAMEDOTCOM)	5m 1s
integration-tests (NS1)	4m 39s
integration-tests (ROUTE53)	3m 14s
integration-tests (SAKURACLOUD)	4m 12s
integration-tests (TRANSIP)	15m 25s
	1h 53m 18s

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