chore: Engine per unit shutdown (#6426)

* chore: Doing engine init and shutdown per unit

* feat: Using per unit engine shutdown

* chore: A little clean-up

* chore: Adding shutdown timeout

* chore: Adding timeout test

Author: yhakbar

internal/configbridge/bridge.go

@@ -148,7 +148,8 @@ func NewRunOptions(opts *options.TerragruntOptions) *run.Options {
 	runOpts.LogDisableErrorSummary = opts.LogDisableErrorSummary
 	runOpts.TerragruntConfigPath = opts.TerragruntConfigPath
 	runOpts.OriginalTerragruntConfigPath = opts.OriginalTerragruntConfigPath
-	runOpts.WorkingDir = opts.WorkingDir
+	runOpts.UnitDir = opts.WorkingDir
+	runOpts.CacheDir = opts.WorkingDir
 	runOpts.RootWorkingDir = opts.RootWorkingDir
 	runOpts.DownloadDir = opts.DownloadDir
 	runOpts.TerraformCommand = opts.TerraformCommand