feat: add customizable upgrade message on client/server version mismatch (#11587)

site/src/api/typesGenerated.ts

@@ -163,6 +163,7 @@ export interface BuildInfoResponse {
   readonly dashboard_url: string;
   readonly workspace_proxy: boolean;
   readonly agent_api_version: string;
+  readonly upgrade_message: string;
 }
 
 // From codersdk/insights.go
@@ -438,6 +439,7 @@ export interface DeploymentValues {
   readonly web_terminal_renderer?: string;
   readonly allow_workspace_renames?: boolean;
   readonly healthcheck?: HealthcheckConfig;
+  readonly cli_upgrade_message?: string;
   readonly config?: string;
   readonly write_config?: boolean;
   readonly address?: string;

site/src/testHelpers/entities.ts

@@ -199,6 +199,7 @@ export const MockBuildInfo: TypesGen.BuildInfoResponse = {
   version: "v99.999.9999+c9cdf14",
   dashboard_url: "https:///mock-url",
   workspace_proxy: false,
+  upgrade_message: "My custom upgrade message",
 };
 
 export const MockSupportLinks: TypesGen.LinkConfig[] = [