{CI} Disable Credential Scanner

[wangzelin007]

Temporarily disable Credential Scanner
https://dev.azure.com/azclitools/public/_build/results?buildId=133760&view=logs&j=9a50307c-53e6-51fa-ddad-d8767a4a0ece&t=854f603a-ce91-59a3-a3f0-bfbaa050f0db

Attempting to gather dependency information for package 'Microsoft.Security.CredScan.2.1.17' with respect to project 'D:\a\_work\_sdt', targeting 'Any,Version=v0.0'
MSBuild auto-detection: using msbuild version '16.11.2.50704' from 'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Current\bin'.
Using credentials from config. UserName: VssSessionToken
WARNING: The plugin credential provider could not acquire credentials. Authentication may require manual action. Consider re-running the command with --interactive for `dotnet`, /p:NuGetInteractive="true" for MSBuild or removing the -NonInteractive switch for `NuGet`
Unable to load the service index for source https://pkgs.dev.azure.com/secdevtools/_packaging/SecDevTools/nuget/v3/index.json.
  Response status code does not indicate success: 401 (Unauthorized).
##[error]Failed to install Microsoft.Security.CredScan from https://pkgs.dev.azure.com/secdevtools/_packaging/SecDevTools/nuget/v3/index.json
##[error]Please contact mscahelp@microsoft.com for support if the issue persists.
##[warning]Package install failed. Attempts left = 0

[azure-client-tools-bot-prd]

️✔️Azure CLI Extensions Breaking Change Test

️✔️Non Breaking Changes

[azure-client-tools-bot-prd]

Hi @wangzelin007,
Since the current milestone time is less than 7 days, this pr will be reviewed in the next milestone.

[azure-client-tools-bot-prd]

Hi @wangzelin007,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[yonzhan]

CI