Default completer for `SuppressMessageAttribute` sets invalid parameter value for `checkId`

Prerequisites

• I have written a descriptive issue title.
• I have searched all open and closed issues to ensure it has not already been reported.
• I have read the troubleshooting guide.
• I am sure this issue is with the extension itself and does not reproduce in a standalone PowerShell instance.
• I have verified that I am using the latest version of Visual Studio Code and the PowerShell extension.
• If this is a security issue, I have read the security issue reporting guidance.

Summary

When adding a SuppressMessageRule using the autosuggest functionality it sets the checkId parameter to $null rather than '' which does not correctly suppress the PSSA rule.

PowerShell Version

┏[MichaelO'Toole][dev]
┖[R:\Development\NinjaGet]> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.3.5
PSEdition                      Core
GitCommitId                    7.3.5
OS                             Microsoft Windows 10.0.22621
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visual Studio Code Version

┏[MichaelO'Toole][dev]
┖[R:\Development\NinjaGet]> code --version
1.79.2
695af097c7bd098fbf017ce3ac85e09bbc5dda06
x64

Extension Version

┏[MichaelO'Toole][dev]
┖[R:\Development\NinjaGet]> code --list-extensions --show-versions | Select-String powershell

ms-vscode.powershell@2023.6.0

Steps to Reproduce

Create a blank PS function with a verb that can change system state with the PSSUseShouldProcessForStateChangingFunctions rule enabled - add the suppress rule from the auto complete - note that the warning remains.

Alter the second parameter to '' instead of $null and notice suppression works.

Visuals

No response

Logs

No response

Start by locating the SuppressMessageAttribute autocomplete definition in the VS Code PowerShell extension and reproduce the completion described in the issue. Trace the generated checkId argument and update the completion so suppression works with the empty-string value rather than $null. Verify the reproduced PSSUseShouldProcessForStateChangingFunctions warning is suppressed afterward.