Fix and re-enable update-dependencies pipeline

[lbussell]

I have disabled the scheduled runs of the update-dependencies pipeline in the Azure DevOps UI for several reasons:

1. We do not currently have .NET 10 images in the nightly repo
2. It has failed every day for a number of weeks with this error message > ```

   ##[debug]Processed: ##vso[task.setvariable variable=versionInfos][{"SdkVersion":"9.0.101-servicing.24561.8","StableBranding":true,"DockerfileVersion":"9.0","RuntimeVersion":"9.0.0-rtm.24516.10","AspnetVersion":"9.0.0-rtm.24516.19"}]
   Get-DropVersions.ps1: /home/vsts/work/_temp/c63cb427-081e-4bad-b278-93e2185667e5.ps1:25
   Line |
   25 | /home/vsts/work/1/s/eng/Get-DropVersions.ps1 @Args
   | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   | The variable '$internalBaseUrl' cannot be retrieved because it has not
   | been set.

3. We need to implement Update-dependencies pipeline: create separate PRs per upgraded image component #5990

As part of this, we should also re-enable the Syft and Ubuntu Chiseled updaters:

dotnet-docker/eng/update-dependencies/UpdateDependencies.cs

Lines 386 to 391 in 96825a0

	// Disable additional updaters due to https://github.com/dotnet/dotnet-docker/issues/5990
	// Chisel updaters must be listed before runtime version
	// updaters because they check the manifest for whether the
	// runtime versions are being updated or not
	// ..chiselUpdaters,
	// syftUpdater