Update Terraform Plugin SDK to V2 (#261)

This will update the Terraform Plugin SDK from V1 to V2 major release and bump the SDK to the
latest version (v2.33.0).

The update also changes the requirements:

* Drops support for terraform <= 0.11.
* Requires Go >= 1.21
* Supports use for schema version v5.

All Go-VCR tests have been re-recorded.

Closes #140

---------

Co-authored-by: Tobias Brodén <tobias@84codes.com>

Author: tete17

cloudamqp/data_source_cloudamqp_account.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceAccount() *schema.Resource {

cloudamqp/data_source_cloudamqp_account_vpcs.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceAccountVpcs() *schema.Resource {

cloudamqp/data_source_cloudamqp_alarm.go

@@ -5,14 +5,14 @@ import (
 	"strconv"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceAlarm() *schema.Resource {
 	return &schema.Resource{
 		Read: dataSourceAlarmRead,
 		Importer: &schema.ResourceImporter{
-			State: schema.ImportStatePassthrough,
+			StateContext: schema.ImportStatePassthroughContext,
 		},
 		Schema: map[string]*schema.Schema{
 			"instance_id": {
@@ -26,10 +26,10 @@ func dataSourceAlarm() *schema.Resource {
 				Description: "Alarm identifier",
 			},
 			"type": {
-				Type:         schema.TypeString,
-				Optional:     true,
-				Description:  "Type of the alarm",
-				ValidateFunc: validateAlarmType(),
+				Type:             schema.TypeString,
+				Optional:         true,
+				Description:      "Type of the alarm",
+				ValidateDiagFunc: validateAlarmType(),
 			},
 			"enabled": {
 				Type:        schema.TypeBool,

cloudamqp/data_source_cloudamqp_credentials.go

@@ -2,7 +2,7 @@ package cloudamqp
 
 import (
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 
 	"fmt"
 )

cloudamqp/data_source_cloudamqp_instance.go

@@ -5,14 +5,14 @@ import (
 	"strconv"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceInstance() *schema.Resource {
 	return &schema.Resource{
 		Read: dataSourceInstanceRead,
 		Importer: &schema.ResourceImporter{
-			State: schema.ImportStatePassthrough,
+			StateContext: schema.ImportStatePassthroughContext,
 		},
 		Schema: map[string]*schema.Schema{
 			"instance_id": {

cloudamqp/data_source_cloudamqp_nodes.go

@@ -5,7 +5,7 @@ import (
 	"strconv"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceNodes() *schema.Resource {

cloudamqp/data_source_cloudamqp_notification.go

@@ -5,14 +5,14 @@ import (
 	"strconv"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceNotification() *schema.Resource {
 	return &schema.Resource{
 		Read: dataSourceNotificationRead,
 		Importer: &schema.ResourceImporter{
-			State: schema.ImportStatePassthrough,
+			StateContext: schema.ImportStatePassthroughContext,
 		},
 		Schema: map[string]*schema.Schema{
 			"instance_id": {

cloudamqp/data_source_cloudamqp_plugins.go

@@ -5,7 +5,7 @@ import (
 	"log"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourcePlugins() *schema.Resource {

cloudamqp/data_source_cloudamqp_plugins_community.go

@@ -5,7 +5,7 @@ import (
 	"log"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourcePluginsCommunity() *schema.Resource {

cloudamqp/data_source_cloudamqp_upgradable_versions.go

@@ -4,7 +4,7 @@ import (
 	"strconv"
 
 	"github.com/84codes/go-api/api"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 )
 
 func dataSourceUpgradableVersions() *schema.Resource {