fix: use service type block-storage for volume v3

BREAKING CHANGE
    May cause failures if the old volumev3 service type is used.

src/services.rs

@@ -132,16 +132,21 @@ pub struct GenericService {
     major_version: VersionSelector,
 }
 
-/// Compute service.
+/// Block storage service (v3).
 #[derive(Copy, Clone, Debug)]
 #[non_exhaustive]
-pub struct ComputeService;
+pub struct BlockStorageService;
 
 service! {
     #[doc = "Bare Metal service."]
     BAREMETAL: BareMetalService -> "baremetal", header "x-openstack-ironic-api-version"
 }
 
+/// Compute service.
+#[derive(Copy, Clone, Debug)]
+#[non_exhaustive]
+pub struct ComputeService;
+
 service! {
     #[doc = "Image service."]
     IMAGE: ImageService -> "image"
@@ -157,11 +162,6 @@ service! {
     OBJECT_STORAGE: ObjectStorageService -> "object-store", discovery false
 }
 
-service! {
-    #[doc = "Block Storage service (v3)."]
-    BLOCK_STORAGE: BlockStorageService -> "volumev3"
-}
-
 impl GenericService {
     /// Create a new generic service.
     pub const fn new(catalog_type: &'static str, major_version: VersionSelector) -> GenericService {
@@ -187,13 +187,30 @@ impl ServiceType for GenericService {
     }
 }
 
+impl BlockStorageService {
+    /// Create a Compute service type.
+    pub const fn new() -> BlockStorageService {
+        BlockStorageService
+    }
+}
+
 impl ComputeService {
     /// Create a Compute service type.
     pub const fn new() -> ComputeService {
         ComputeService
     }
 }
 
+impl ServiceType for BlockStorageService {
+    fn catalog_type(&self) -> &'static str {
+        "block-storage"
+    }
+
+    fn major_version_supported(&self, version: ApiVersion) -> bool {
+        version.0 == 3
+    }
+}
+
 impl ServiceType for ComputeService {
     fn catalog_type(&self) -> &'static str {
         "compute"
@@ -214,5 +231,8 @@ impl VersionedService for ComputeService {
     }
 }
 
+/// Block storage service (v3).
+pub const BLOCK_STORAGE: BlockStorageService = BlockStorageService::new();
+
 /// Compute service.
 pub const COMPUTE: ComputeService = ComputeService::new();