test(perf): update thresholds in buildIndex tests (aws#6228)

## Problem
Performance test was reliant on dead code removed in
aws#6218

## Solution
- update thresholds to accommodate the change. 

---

- Treat all work as PUBLIC. Private `feature/x` branches will not be
squash-merged at release time.
- Your code changes must meet the guidelines in
[CONTRIBUTING.md](https://github.com/aws/aws-toolkit-vscode/blob/master/CONTRIBUTING.md#guidelines).

License: I confirm that my contribution is made under the terms of the
Apache 2.0 license.

Author: Hweinstock

packages/core/src/testInteg/perf/buildIndex.test.ts

@@ -10,7 +10,7 @@ import assert from 'assert'
 import { LspClient, LspController } from '../../amazonq'
 import { LanguageClient, ServerOptions } from 'vscode-languageclient'
 import { createTestWorkspace } from '../../test/testUtil'
-import { BuildIndexRequestType, GetRepomapIndexJSONRequestType, GetUsageRequestType } from '../../amazonq/lsp/types'
+import { BuildIndexRequestType, GetUsageRequestType } from '../../amazonq/lsp/types'
 import { fs, getRandomString } from '../../shared'
 import { FileSystem } from '../../shared/fs/fs'
 import { getFsCallsUpperBound } from './utilities'
@@ -22,11 +22,10 @@ interface SetupResult {
 }
 
 async function verifyResult(setup: SetupResult) {
-    // A correct run makes 3 requests, but don't want to make it exact to avoid over-sensitivity to implementation. If we make 10+ something is likely wrong.
-    assert.ok(setup.clientReqStub.callCount >= 3 && setup.clientReqStub.callCount <= 10)
+    // A correct run makes 2 requests, but don't want to make it exact to avoid over-sensitivity to implementation. If we make 10+ something is likely wrong.
+    assert.ok(setup.clientReqStub.callCount >= 2 && setup.clientReqStub.callCount <= 10)
     assert.ok(setup.clientReqStub.calledWith(BuildIndexRequestType))
     assert.ok(setup.clientReqStub.calledWith(GetUsageRequestType))
-    assert.ok(setup.clientReqStub.calledWith(GetRepomapIndexJSONRequestType))
 
     assert.strictEqual(getFsCallsUpperBound(setup.fsSpy), 0, 'should not make any fs calls')
     assert.ok(setup.findFilesSpy.callCount <= 2, 'findFiles should not be called more than twice')