script/test: Add another timeout message to retry for

[DeeDeeG]

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Identify the Bug

Timeouts in CI.

Example timeout: CI Link

Details

In the Windows Tests x64_Renderer_Test2 job:

Workspace
  .checkoutHeadRevision()
    it Workspace .checkoutHeadRevision() reverts to the version of its file checked into the project repository
      Error: Timed out waiting on anonymous condition
        at conditionPromise (D:\a\1\s\spec\async-spec-helpers.js:20:13)
        at jasmine.Spec.<anonymous> (D:\a\1\s\spec\workspace-spec.js:3931:7)

Follow-up to: #21295

Description of the Change

Retry any test if the message "Error: Timed out waiting on [ . . . ]" is encountered.

(I've so far only seen this as "Error: Timed out waiting on anonymous condition", but I left it more general in case it applies to named conditions as well (whatever those would be).)

Alternate Designs

None.

Possible Drawbacks

Makes these flaky tests stand out a bit less in the results.

Verification Process

I suppose to properly verify this, one would have to run this through CI a bunch of times and try to notice whether there are fewer timeouts making the CI fail. I don't see why it wouldn't work, though.

Release Notes

N/A

[sadick254]

Looks great. 👍