Replace Instance.disposeAll/load with fixture helper (#25418)

packages/opencode/test/server/httpapi-mcp.test.ts

@@ -8,7 +8,7 @@ import { Instance } from "../../src/project/instance"
 import { Server } from "../../src/server/server"
 import * as Log from "@opencode-ai/core/util/log"
 import { resetDatabase } from "../fixture/db"
-import { provideInstance, tmpdir } from "../fixture/fixture"
+import { disposeAllInstances, provideInstance, tmpdir } from "../fixture/fixture"
 import { testEffect } from "../lib/effect"
 
 void Log.init({ print: false })
@@ -76,7 +76,7 @@ const readResponse = Effect.fnUntraced(function* (input: { app: TestApp; path: s
 
 afterEach(async () => {
   Flag.OPENCODE_EXPERIMENTAL_HTTPAPI = original
-  await Instance.disposeAll()
+  await disposeAllInstances()
   await resetDatabase()
 })