Fix or suppress warnings in unit-test command

[mikeharder]

The command rush unit-test generates 4 warnings. These warnings add noise to the build log, and cause build failures in Rush 5.9.0 and later.

SUCCESS WITH WARNINGS (4)
================================
@azure/identity (4.76 seconds)
Excluding: "/home/vsts/work/1/s/sdk/identity/identity/test-browser/index.js"

@azure/storage-blob (1 minute 13.4 seconds)
Excluding: "/home/vsts/work/1/s/sdk/storage/storage-blob/dist-test/index.browser.js"

@azure/storage-file (1 minute 10.1 seconds)
Excluding: "/home/vsts/work/1/s/sdk/storage/storage-file/dist-test/index.browser.js"

@azure/storage-queue (1 minute 2.6 seconds)
Excluding: "/home/vsts/work/1/s/sdk/storage/storage-queue/dist-test/index.browser.js"
================================

https://dev.azure.com/azure-sdk/public/_build/results?buildId=65710&view=logs&j=5aded954-f3f8-5654-771c-2734fb7ecea6&t=bfb220ef-950d-5fe9-00e0-4eac6f5034d1&l=2940

[daviwil]

Thanks Mike! I'll take a look.

[mikeharder]

@daviwil: We fixed this in some commands by just redirecting STDERR to STDOUT (2>&1):

azure-sdk-for-js/sdk/core/core-amqp/package.json

Line 28 in 64c5e98

"build": "tsc -p . && rollup -c 2>&1",

[daviwil]

Yep, I'll go that route if I can verify for sure that Karma isn't trying to tell us about an actual problem.

[jeremymeng]

We have #3993 tracking rollup warning for storage. Removing storage label from this.

[ramya-rao-a]

Like @jeremymeng mentioned, we have #3993 for tracking the warnings from building storage tests
#9855 and #9897 will fix the warnings from building identity code and tests