bug: flake: e2e framework data race

[stevekuznetsov]

Describe the bug

 ==================
WARNING: DATA RACE
Read at 0x00c000015a50 by goroutine 194:
  github.com/kcp-dev/kcp/test/e2e/framework.newWorkspaceFixture[...].func2()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/workspaces.go:156 +0x253
  testing.(*common).Cleanup.func1()
      /usr/local/go/src/testing/testing.go:1041 +0x193
  testing.(*common).runCleanup()
      /usr/local/go/src/testing/testing.go:1210 +0x143
  testing.tRunner.func2()
      /usr/local/go/src/testing/testing.go:1440 +0x52
  runtime.deferCallSave()
      /usr/local/go/src/runtime/panic.go:796 +0x87
  testing.(*T).FailNow()
      <autogenerated>:1 +0x37
  github.com/stretchr/testify/require.Eventually()
      /go/pkg/mod/github.com/stretchr/[email protected]/require/require.go:364 +0xde
  github.com/kcp-dev/kcp/test/e2e/framework.Eventually()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/util.go:327 +0x266
  github.com/kcp-dev/kcp/test/e2e/framework.newWorkspaceFixture[...]()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/workspaces.go:159 +0xa16
  github.com/kcp-dev/kcp/test/e2e/framework.NewWorkspaceFixture()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/workspaces.go:189 +0x137
  github.com/kcp-dev/kcp/test/e2e/conformance.TestCRDCrossLogicalClusterListPartialObjectMetadata()
      /go/src/github.com/kcp-dev/kcp/test/e2e/conformance/cross_logical_cluster_list_test.go:145 +0x6ee
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      /usr/local/go/src/testing/testing.go:1493 +0x47
Previous write at 0x00c000015a50 by goroutine 4932:
  github.com/kcp-dev/kcp/test/e2e/framework.newWorkspaceFixture[...].func3()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/workspaces.go:161 +0x16e
  github.com/kcp-dev/kcp/test/e2e/framework.Eventually.func1()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/util.go:330 +0x87
  github.com/stretchr/testify/assert.Eventually.func1()
      /go/pkg/mod/github.com/stretchr/[email protected]/assert/assertions.go:1691 +0x39
Goroutine 194 (running) created at:
  testing.(*T).Run()
      /usr/local/go/src/testing/testing.go:1493 +0x75d
  testing.runTests.func1()
      /usr/local/go/src/testing/testing.go:1846 +0x99
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1446 +0x216
  testing.runTests()
      /usr/local/go/src/testing/testing.go:1844 +0x7ec
  testing.(*M).Run()
      /usr/local/go/src/testing/testing.go:1726 +0xa84
  main.main()
      _testmain.go:59 +0x2e9
Goroutine 4932 (finished) created at:
  github.com/stretchr/testify/assert.Eventually()
      /go/pkg/mod/github.com/stretchr/[email protected]/assert/assertions.go:1691 +0x3a5
  github.com/stretchr/testify/require.Eventually()
      /go/pkg/mod/github.com/stretchr/[email protected]/require/require.go:361 +0xb8
  github.com/kcp-dev/kcp/test/e2e/framework.Eventually()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/util.go:327 +0x266
  github.com/kcp-dev/kcp/test/e2e/framework.newWorkspaceFixture[...]()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/workspaces.go:159 +0xa16
  github.com/kcp-dev/kcp/test/e2e/framework.NewWorkspaceFixture()
      /go/src/github.com/kcp-dev/kcp/test/e2e/framework/workspaces.go:189 +0x137
  github.com/kcp-dev/kcp/test/e2e/conformance.TestCRDCrossLogicalClusterListPartialObjectMetadata()
      /go/src/github.com/kcp-dev/kcp/test/e2e/conformance/cross_logical_cluster_list_test.go:145 +0x6ee
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      /usr/local/go/src/testing/testing.go:1493 +0x47
================== 

Steps To Reproduce

https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/kcp-dev_kcp/2690/pull-ci-kcp-dev-kcp-main-e2e-sharded/1618731879718981632

Expected Behaviour

.

Additional Context

No response