Add datastore acceptance tests

The tests can be run against a real system with:

```
$ make testacc
```

or in 'simulation' mode with:

```
$ make testacc-simulation
```

In simulation mode fake http responses are injected using gock.
This allows running the acceptance tests without requiring real
hardware.

Makefile

@@ -5,19 +5,27 @@
 build:
 	go build ./...
 
+build-experimental:
+	go build -tags experimental ./...
+
 install:
 	go install ./...
 
+install-experimental:
+	go install -tags experimental  ./...
+
 test:
 	go test ./...
 
+testacc:
+	go install -tags experimental ./cmd/...
+	env TF_ACC=1 go test -v ./test/...
+
+testacc-simulation:
+	go install -tags experimental,simulation ./cmd/...
+	env TF_ACC=1 go test -v -tags simulation ./test/...
+
 lint:
 	@golangci-lint --version
 	# Will use .golangci.yml
 	golangci-lint run
-
-build-experimental:
-	go build -tags experimental ./...
-
-install-experimental:
-	go install -tags experimental  ./...

go.mod

@@ -4,10 +4,12 @@ go 1.22.3
 
 require (
 	github.com/google/uuid v1.6.0
+	github.com/h2non/gock v1.2.0
 	github.com/hashicorp/terraform-plugin-framework v1.11.0
 	github.com/hashicorp/terraform-plugin-framework-validators v0.13.0
 	github.com/hashicorp/terraform-plugin-go v0.23.0
 	github.com/hashicorp/terraform-plugin-log v0.9.0
+	github.com/hashicorp/terraform-plugin-testing v1.10.0
 	github.com/microsoft/kiota-abstractions-go v1.6.1
 	github.com/microsoft/kiota-http-go v1.4.4
 	github.com/microsoft/kiota-serialization-form-go v1.0.0
@@ -17,33 +19,63 @@ require (
 )
 
 require (
+	github.com/ProtonMail/go-crypto v1.1.0-alpha.2 // indirect
+	github.com/agext/levenshtein v1.2.2 // indirect
+	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
 	github.com/cjlapao/common-go v0.0.39 // indirect
+	github.com/cloudflare/circl v1.3.7 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fatih/color v1.13.0 // indirect
+	github.com/fatih/color v1.16.0 // indirect
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
-	github.com/hashicorp/go-hclog v1.5.0 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/hashicorp/go-checkpoint v0.5.0 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/go-cty v1.4.1-0.20200414143053-d3edf31b6320 // indirect
+	github.com/hashicorp/go-hclog v1.6.3 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/hashicorp/go-plugin v1.6.0 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.7 // indirect
 	github.com/hashicorp/go-uuid v1.0.3 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/hashicorp/hc-install v0.8.0 // indirect
+	github.com/hashicorp/hcl/v2 v2.21.0 // indirect
+	github.com/hashicorp/logutils v1.0.0 // indirect
+	github.com/hashicorp/terraform-exec v0.21.0 // indirect
+	github.com/hashicorp/terraform-json v0.22.1 // indirect
+	github.com/hashicorp/terraform-plugin-sdk/v2 v2.34.0 // indirect
 	github.com/hashicorp/terraform-registry-address v0.2.3 // indirect
 	github.com/hashicorp/terraform-svchost v0.1.1 // indirect
 	github.com/hashicorp/yamux v0.1.1 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
+	github.com/mitchellh/go-wordwrap v1.0.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/oklog/run v1.0.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/std-uritemplate/std-uritemplate/go v0.0.57 // indirect
 	github.com/stretchr/testify v1.9.0 // indirect
+	github.com/vmihailenco/msgpack v4.0.4+incompatible // indirect
 	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	github.com/zclconf/go-cty v1.15.0 // indirect
 	go.opentelemetry.io/otel v1.24.0 // indirect
 	go.opentelemetry.io/otel/metric v1.24.0 // indirect
 	go.opentelemetry.io/otel/trace v1.24.0 // indirect
-	golang.org/x/net v0.23.0 // indirect
-	golang.org/x/sys v0.18.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/mod v0.19.0 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
+	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	google.golang.org/appengine v1.6.8 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240227224415-6ceb2ff114de // indirect
 	google.golang.org/grpc v1.63.2 // indirect
 	google.golang.org/protobuf v1.34.0 // indirect