Correctly quote directory name in the initContainer script. (#17920)

The original quoting prevented the globbing expansion to happen,
making workdir content persist across volume restarts. This PR
modifies the behavior to allow for the expansion.

Note: this is not a full-featured fix to this issue (e.g. doesn't
handle dotfiles) and depending on how/whether concourse does any
shell escaping, this might need some further work.

Signed-off-by: Milan Plzik <milan.plzik@ceai.io>

stable/concourse/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: concourse
-version: 8.2.6
+version: 8.2.7
 appVersion: 5.6.0
 description: Concourse is a simple and scalable CI system.
 icon: https://avatars1.githubusercontent.com/u/7809479

stable/concourse/templates/worker-statefulset.yaml

@@ -61,7 +61,7 @@ spec:
               for v in $((btrfs subvolume list --sort=-ogen "{{ .Values.concourse.worker.workDir }}" || true) | awk '{print $9}'); do
                 (btrfs subvolume show "{{ .Values.concourse.worker.workDir }}/$v" && btrfs subvolume delete "{{ .Values.concourse.worker.workDir }}/$v") || true
               done
-              rm -rf "{{ .Values.concourse.worker.workDir }}/*"
+              rm -rf "{{ .Values.concourse.worker.workDir }}"/*
           volumeMounts:
             - name: concourse-work-dir
               mountPath: {{ .Values.concourse.worker.workDir | quote }}