Refactor: Use Go Generics for RecordConfig processing #183

Job	Run time
integration-test-providers	12s
integration-tests (AXFRDDNS)	1m 45s
integration-tests (AXFRDDNS_DNSSEC)	1m 56s
integration-tests (BIND)	1m 34s
integration-tests (AZURE_DNS)	8m 24s
integration-tests (CLOUDFLAREAPI)	9m 23s
integration-tests (CNR)	6m 33s
integration-tests (DIGITALOCEAN)	4m 48s
integration-tests (GANDI_V5)	6m 11s
integration-tests (GCLOUD)	8m 42s
integration-tests (HEDNS)	10m 33s
integration-tests (HEXONET)	2m 44s
integration-tests (MYTHICBEASTS)	13m 9s
integration-tests (NAMEDOTCOM)	3m 54s
integration-tests (NS1)	3m 2s
integration-tests (ROUTE53)	4m 20s
integration-tests (SAKURACLOUD)	4m 10s
integration-tests (TRANSIP)	15m 56s
	1h 47m 16s

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