[IPAM] Update schema to remove default value for compartment_id in Address Block, Subnet, and Address (#242)

* Address bug NPA-910

* bug 241 - comp id fix

---------

Co-authored-by: Ujjwal Nasra <125353741+unasra@users.noreply.github.com>

Author: AnilGadiyarHJ

internal/service/ipam/model_ipamsvc_address.go

@@ -93,7 +93,6 @@ var IpamsvcAddressResourceSchemaAttributes = map[string]schema.Attribute{
 	},
 	"compartment_id": schema.StringAttribute{
 		Computed:            true,
-		Default:             stringdefault.StaticString(""),
 		MarkdownDescription: "The compartment associated with the object. If no compartment is associated with the object, the value defaults to empty.",
 	},
 	"created_at": schema.StringAttribute{

internal/service/ipam/model_ipamsvc_address_block.go

@@ -169,7 +169,6 @@ var IpamsvcAddressBlockResourceSchemaAttributes = map[string]schema.Attribute{
 	"compartment_id": schema.StringAttribute{
 		Optional:            true,
 		Computed:            true,
-		Default:             stringdefault.StaticString(""),
 		MarkdownDescription: "The compartment associated with the object. If no compartment is associated with the object, the value defaults to empty.",
 	},
 	"created_at": schema.StringAttribute{

internal/service/ipam/model_ipamsvc_subnet.go

@@ -178,8 +178,7 @@ var IpamsvcSubnetResourceSchemaAttributes = map[string]schema.Attribute{
 		MarkdownDescription: "The description for the subnet. May contain 0 to 1024 characters. Can include UTF-8.",
 	},
 	"compartment_id": schema.StringAttribute{
-		Computed:            true,
-		Default:             stringdefault.StaticString(""),
+		Computed: true,
 		MarkdownDescription: "The compartment associated with the object. If no compartment is associated with the object, the value defaults to empty.",
 	},
 	"config_profiles": schema.ListAttribute{