feat: add is_prebuild_claim to distinguish post-claim provisioning (#17757)

Used in combination with
https://github.com/coder/terraform-provider-coder/pull/396

This is required by both https://github.com/coder/coder/pull/17475 and
https://github.com/coder/coder/pull/17571

Operators may need to conditionalize their templates to perform certain
operations once a prebuilt workspace has been claimed. This value will
**only** be set once a claim takes place and a subsequent `terraform
apply` occurs. Any `terraform apply` runs thereafter will be
indistinguishable from a normal run on a workspace.

---------

Signed-off-by: Danny Kopping <dannykopping@gmail.com>

coderd/provisionerdserver/provisionerdserver.go

@@ -645,7 +645,7 @@ func (s *server) acquireProtoJob(ctx context.Context, job database.ProvisionerJo
 					WorkspaceBuildId:              workspaceBuild.ID.String(),
 					WorkspaceOwnerLoginType:       string(owner.LoginType),
 					WorkspaceOwnerRbacRoles:       ownerRbacRoles,
-					IsPrebuild:                    input.IsPrebuild,
+					PrebuiltWorkspaceBuildStage:   input.PrebuiltWorkspaceBuildStage,
 				},
 				LogLevel: input.LogLevel,
 			},
@@ -2471,11 +2471,10 @@ type TemplateVersionImportJob struct {
 
 // WorkspaceProvisionJob is the payload for the "workspace_provision" job type.
 type WorkspaceProvisionJob struct {
-	WorkspaceBuildID      uuid.UUID `json:"workspace_build_id"`
-	DryRun                bool      `json:"dry_run"`
-	IsPrebuild            bool      `json:"is_prebuild,omitempty"`
-	PrebuildClaimedByUser uuid.UUID `json:"prebuild_claimed_by,omitempty"`
-	LogLevel              string    `json:"log_level,omitempty"`
+	WorkspaceBuildID            uuid.UUID                            `json:"workspace_build_id"`
+	DryRun                      bool                                 `json:"dry_run"`
+	LogLevel                    string                               `json:"log_level,omitempty"`
+	PrebuiltWorkspaceBuildStage sdkproto.PrebuiltWorkspaceBuildStage `json:"prebuilt_workspace_stage,omitempty"`
 }
 
 // TemplateVersionDryRunJob is the payload for the "template_version_dry_run" job type.