Add Debian based stx-vault-manager image

Restore the image build for stx-vault-manager. Reference the removal of
CentOS based image: commit 20167fc5.  It is effectively the same but for
Debian, a newer kubectl version, and the 'slim' image size.

Vault manager uses kubectl and miscellaneous tools including: curl, jq,
awk, bash, grep, sed and coreutils.

Test Plan:
PASS - Standard, dedicated storage 2+2+2
PASS - apply vault application with helm override to use the new image
PASS - observe pod logs, vault-manager operation
PASS - test vault HA, observe vault-manager operation
PASS - configure vault, configure secret, read secret
PASS - apply helloworld app, confirm read secret

Story: 2010393
Task: 46869

Change-Id: I9ca31d2f1047e704f961936ba8f04a7abdab56f5
Signed-off-by: Michel Thebeau <Michel.Thebeau@windriver.com>

debian_stable_docker_images.inc

@@ -0,0 +1 @@
+stx-vault-manager

stx-vault-manager/debian/docker/Dockerfile

@@ -0,0 +1,13 @@
+from debian:stable-slim
+
+ENV KUBE_LATEST_VERSION="v1.24.4"
+ENV KUBECTL_DL_URL="https://storage.googleapis.com/kubernetes-release/release/${KUBE_LATEST_VERSION}/bin/linux/amd64/kubectl"
+
+RUN set -ex; \
+    PKG_LIST="mawk bash coreutils curl grep sed jq"; \
+    apt-get update && apt-get install -y $PKG_LIST \
+    && apt-get clean && rm -r /var/lib/apt/lists/* \
+    && curl -L "$KUBECTL_DL_URL" -o /usr/local/bin/kubectl \
+    && chmod +x /usr/local/bin/kubectl
+
+CMD ["bash"]

stx-vault-manager/debian/stx-vault-manager.stable_docker_image

@@ -0,0 +1,2 @@
+BUILDER=docker
+LABEL=stx-vault-manager