Add scylla connector

It is essentially copy of cassandra connector
Only added consistency level and host policy config
Since github.com/scylladb/gocql has "github/gocql/gocql" in go.mod
 it is necessary to have go.mod in scylla connector directory with
 "replace" directive.

internal/impl/scylla/go.mod

@@ -0,0 +1,85 @@
+module github.com/redpanda-data/connect/v4/internal/impl/scylla
+
+go 1.22.0
+
+toolchain go1.22.4
+
+replace (
+	github.com/gocql/gocql => github.com/scylladb/gocql v1.14.2
+	github.com/redpanda-data/connect/v4 => ../../../../..
+)
+
+require (
+	github.com/gocql/gocql v0.0.0-00010101000000-000000000000
+	github.com/ory/dockertest/v3 v3.10.0
+	github.com/redpanda-data/benthos/v4 v4.33.0
+	github.com/stretchr/testify v1.9.0
+)
+
+require (
+	cuelang.org/go v0.9.1 // indirect
+	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
+	github.com/Jeffail/gabs/v2 v2.7.0 // indirect
+	github.com/Jeffail/shutdown v1.0.0 // indirect
+	github.com/Microsoft/go-winio v0.6.0 // indirect
+	github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 // indirect
+	github.com/OneOfOne/xxhash v1.2.8 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cockroachdb/apd/v3 v3.2.1 // indirect
+	github.com/containerd/continuity v0.3.0 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/docker/cli v20.10.17+incompatible // indirect
+	github.com/docker/docker v20.10.7+incompatible // indirect
+	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/docker/go-units v0.4.0 // indirect
+	github.com/fatih/color v1.17.0 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/gofrs/uuid v4.4.0+incompatible // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.1 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
+	github.com/gorilla/handlers v1.5.2 // indirect
+	github.com/gorilla/mux v1.8.1 // indirect
+	github.com/hailocab/go-hostpool v0.0.0-20160125115350-e80d13ce29ed // indirect
+	github.com/imdario/mergo v0.3.12 // indirect
+	github.com/matoous/go-nanoid/v2 v2.1.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/moby/term v0.0.0-20201216013528-df9cb8a40635 // indirect
+	github.com/nsf/jsondiff v0.0.0-20210926074059-1e845ec5d249 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.0 // indirect
+	github.com/opencontainers/runc v1.1.5 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/segmentio/ksuid v1.0.4 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/tilinna/z85 v1.0.0 // indirect
+	github.com/urfave/cli/v2 v2.27.2 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
+	github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a // indirect
+	go.opentelemetry.io/otel v1.27.0 // indirect
+	go.opentelemetry.io/otel/metric v1.27.0 // indirect
+	go.opentelemetry.io/otel/trace v1.27.0 // indirect
+	golang.org/x/crypto v0.25.0 // indirect
+	golang.org/x/mod v0.17.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
+	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)