[release/6.0] Skip failing cert tests for now

[github-actions]

Backport of #39670 to release/6.0

/cc @HaoK

{PR title}

Summary of the changes (Less than 80 chars)

Description

{Detail}

Fixes #{bug number} (in this specific format)

Customer Impact

{Justification}

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

Risk

• High
• Medium
• Low

[Justify the selection above]

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

---

When servicing release/2.1

• Make necessary changes in eng/PatchConfig.props

[ghost]

Hi @github-actions[bot]. If this is not a tell-mode PR, please make sure to follow the instructions laid out in the servicing process document.
Otherwise, please add tell-mode label.

[dougbu]

What's the status of the longer-term fix of updating the relevant certificate❔

[dougbu]

YARN(0,0): error : (NETCORE_ENGINEERING_TELEMETRY=Test) No Connection with that ID: Status code '404' in wwwroot/dist/signalr-functional-tests.js (line 2554)

@BrennanConroy I saw this error in another PR earlier today. Is there a workaround❔

[BrennanConroy]

#39679

[dougbu]

Suggest combining this PR (thanks @HaoK) and #39679 (thanks @BrennanConroy) into one. Otherwise, we'll likely waste time when the branch is next open. Ideal would be a single commit that can be cherry-picked into whatever branch targets 'release/6.0' and makes it easy to clean up their CI runs.

[dougbu]

Also, suggest labeling this PR as tell-mode since it is test-only.

[wtgodbe]

I pushed these commits to #39679, closing in favor of that