fix(access-controller): forward workspace name to Galaxy VM for Terra file source label

Terra passes WORKSPACE_NAME in customEnvironmentVariables (already used for
disk restore validation). Forward it to the VM as terra-workspace-name
metadata and pass to ansible-pull as terra_workspace_name so galaxy-k8s-boot
can populate the workspace: field in the anvil file source config.

Without this the field is empty, causing Galaxy to show "Unlabeled Rfs File
Source" and fail to list workspace files. galaxy-k8s-boot also needs a
matching change to use terra_workspace_name for the workspace: field.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 2 people

http/src/main/scala/org/broadinstitute/dsde/workbench/leonardo/util/GKEInterpreter.scala

@@ -1187,7 +1187,7 @@ class GKEInterpreter[F[_]](
               Items
                 .newBuilder()
                 .setKey("terra-workspace")
-                .setValue(app.workspaceId.map(_.value.toString).getOrElse(""))
+                .setValue(app.customEnvironmentVariables.getOrElse(WORKSPACE_NAME_KEY, ""))
                 .build()
             )
             .addItems(Items.newBuilder().setKey("terra-namespace").setValue(googleProject.value).build())