Add bal:DisplayFilesInUseDialogCondition attribute to disable "Files In Use"

[charles-juicelabs]

We develop an application with a DLL that is loaded into many processes, largely outside of our control. It is confusing for our users when they are prompted to close these seemingly unrelated applications when we update the DLL. Updating the DLL requires a reboot independently of any files being in use anyway, so hiding the "Files In Use" dialog is a nice solution for us.

There are other examples of people wanting to disable the "Files In Use" dialog:

• DisplayInternalUICondition doesn't work correctly Wix 4
• WiX: Avoid showing files-in-use dialog and just prompt for reboot at end of install
• Windows Installer-Avoid FileinUse dialog box when Installing a package
• How to suppress a dialog

Add bal:DisplayFilesInUseDialogCondition, similar to bal::DisplayInternalUICondition, to be added to MsiPackage elements to control the display of "Files In Use" in WixStandardBoostrapperApplication.

For example:

<Bundle Name="...">
  <!-- ... -->
  <Chain>
    <MsiPackage 
      Id="..."
      SourceFile="..."
      bal:DisplayFilesInUseDialogCondition="no"
    />
  </Chain>
</Bundle>

Fixes wixtoolset/issues#8807.

[github-actions]

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[charles-juicelabs]

I wondered if the DisplayFilesInUseDialogCondition should be evaluated in OnExecutePackageBegin or OnPlanPackageBegin instead. I left it here because that's closest to its only use and that seemed clearer. Happy to move it if either of those are more appropriate places.

[charles-juicelabs]

I have read the CLA Document and I hereby sign the CLA.

[charles-juicelabs]

recheck.

[robmen]

@charles-juicelabs The CLA bot is very particular about the message. I believe the . at the end of your sentence is throwing it off.