chore(loadbalancer): switch to new multi API support SDK structure

relates to STACKITTPR-559

Author: marceljk

go.mod

@@ -20,7 +20,7 @@ require (
 	github.com/stackitcloud/stackit-sdk-go/services/git v0.11.0
 	github.com/stackitcloud/stackit-sdk-go/services/iaas v1.3.5
 	github.com/stackitcloud/stackit-sdk-go/services/kms v1.6.0
-	github.com/stackitcloud/stackit-sdk-go/services/loadbalancer v1.8.0
+	github.com/stackitcloud/stackit-sdk-go/services/loadbalancer v1.11.1
 	github.com/stackitcloud/stackit-sdk-go/services/logme v0.27.1
 	github.com/stackitcloud/stackit-sdk-go/services/logs v0.7.1
 	github.com/stackitcloud/stackit-sdk-go/services/mariadb v0.27.1

go.sum

@@ -153,8 +153,6 @@ github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 h1:n661drycOFuPLCN
 github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3/go.mod h1:A0bzQcvG0E7Rwjx0REVgAGH58e96+X0MeOfepqsbeW4=
 github.com/skeema/knownhosts v1.3.1 h1:X2osQ+RAjK76shCbvhHHHVl3ZlgDm8apHEHFqRjnBY8=
 github.com/skeema/knownhosts v1.3.1/go.mod h1:r7KTdC8l4uxWRyK2TpQZ/1o5HaSzh06ePQNxPwTcfiY=
-github.com/stackitcloud/stackit-sdk-go/core v0.23.0 h1:zPrOhf3Xe47rKRs1fg/AqKYUiJJRYjdcv+3qsS50mEs=
-github.com/stackitcloud/stackit-sdk-go/core v0.23.0/go.mod h1:osMglDby4csGZ5sIfhNyYq1bS1TxIdPY88+skE/kkmI=
 github.com/stackitcloud/stackit-sdk-go/core v0.24.0 h1:kHCcezCJ5OGSP7RRuGOxD5rF2wejpkEiRr/OdvNcuPQ=
 github.com/stackitcloud/stackit-sdk-go/core v0.24.0/go.mod h1:osMglDby4csGZ5sIfhNyYq1bS1TxIdPY88+skE/kkmI=
 github.com/stackitcloud/stackit-sdk-go/services/alb v0.12.1 h1:RKaxAymxlyxxE0Gta3yRuQWf07LnlcX+mfGnVB96NHA=
@@ -175,6 +173,8 @@ github.com/stackitcloud/stackit-sdk-go/services/kms v1.6.0 h1:WWU2LpqmazsPDgoRAV
 github.com/stackitcloud/stackit-sdk-go/services/kms v1.6.0/go.mod h1:FuyCm3s/Ihw+tkpVLGMXwgTtlhrijd31cUCUBWpn1p8=
 github.com/stackitcloud/stackit-sdk-go/services/loadbalancer v1.8.0 h1:DxrN85V738CRLynu6MULQHO+OXyYnkhVPgoZKULfFIs=
 github.com/stackitcloud/stackit-sdk-go/services/loadbalancer v1.8.0/go.mod h1:ClPE4TOM1FeaJiwTXvApq4gWaSgTLq6nU3PPHAIQDN4=
+github.com/stackitcloud/stackit-sdk-go/services/loadbalancer v1.11.1 h1:8hLLCP4n9w3K3dqJaKF1PnMpX4qjR8UQL3gDr80hgDI=
+github.com/stackitcloud/stackit-sdk-go/services/loadbalancer v1.11.1/go.mod h1:vqTjmecQ4+oVWzeo9tCOUZ3TrpIIzM+C0apC7cdAD0Y=
 github.com/stackitcloud/stackit-sdk-go/services/logme v0.27.1 h1:6AaWxQNtOEvIvbtyySi5KIrNzxGbKgOayUnA3fpuqns=
 github.com/stackitcloud/stackit-sdk-go/services/logme v0.27.1/go.mod h1:qwpGNPgF7LmfodGPXcgv9uldeSSuFMNJkyD6QPqfiCI=
 github.com/stackitcloud/stackit-sdk-go/services/logs v0.7.1 h1:cuQA5dO8WSM0LBHR2FBpf+RgKH7/DE7+5NUPLxDpgPg=

stackit/internal/services/loadbalancer/loadbalancer/datasource.go

@@ -20,7 +20,7 @@ import (
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate"
 
 	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
-	"github.com/stackitcloud/stackit-sdk-go/services/loadbalancer"
+	loadbalancer "github.com/stackitcloud/stackit-sdk-go/services/loadbalancer/v2api"
 )
 
 // Ensure the implementation satisfies the expected interfaces.
@@ -151,7 +151,7 @@ func (r *loadBalancerDataSource) Schema(_ context.Context, _ datasource.SchemaRe
 							Description: descriptions["listeners.display_name"],
 							Computed:    true,
 						},
-						"port": schema.Int64Attribute{
+						"port": schema.Int32Attribute{
 							Description: descriptions["port"],
 							Computed:    true,
 						},
@@ -160,8 +160,9 @@ func (r *loadBalancerDataSource) Schema(_ context.Context, _ datasource.SchemaRe
 							Computed:    true,
 						},
 						"server_name_indicators": schema.ListNestedAttribute{
-							Description: descriptions["server_name_indicators"],
-							Optional:    true,
+							Description:        descriptions["server_name_indicators"],
+							DeprecationMessage: "`server_name_indicators` is deprecated and will be removed after October 2026",
+							Optional:           true,
 							NestedObject: schema.NestedAttributeObject{
 								Attributes: map[string]schema.Attribute{
 									"name": schema.StringAttribute{
@@ -326,7 +327,7 @@ func (r *loadBalancerDataSource) Schema(_ context.Context, _ datasource.SchemaRe
 							Description: descriptions["target_pools.name"],
 							Computed:    true,
 						},
-						"target_port": schema.Int64Attribute{
+						"target_port": schema.Int32Attribute{
 							Description: descriptions["target_port"],
 							Computed:    true,
 						},
@@ -395,7 +396,7 @@ func (r *loadBalancerDataSource) Read(ctx context.Context, req datasource.ReadRe
 	ctx = tflog.SetField(ctx, "name", name)
 	ctx = tflog.SetField(ctx, "region", region)
 
-	lbResp, err := r.client.GetLoadBalancer(ctx, projectId, region, name).Execute()
+	lbResp, err := r.client.DefaultAPI.GetLoadBalancer(ctx, projectId, region, name).Execute()
 	if err != nil {
 		utils.LogError(
 			ctx,