fix(deps): update module github.com/newrelic/infra-integrations-sdk/v3 to v4

Author: renovate[bot]

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/go-viper/mapstructure/v2 v2.5.0
 	github.com/jmoiron/sqlx v1.4.0
 	github.com/lib/pq v1.12.3
-	github.com/newrelic/infra-integrations-sdk/v3 v3.9.1
+	github.com/newrelic/infra-integrations-sdk/v4 v4.2.1
 	github.com/stretchr/testify v1.11.1
 	github.com/xeipuuv/gojsonschema v1.2.0
 	gopkg.in/DATA-DOG/go-sqlmock.v1 v1.3.0