feat(helm): add securityContexts to jobs

[zvlb]

local test:

~ kind create cluster
...

~ k cluster-info
Kubernetes control plane is running at https://127.0.0.1:61015
CoreDNS is running at https://127.0.0.1:61015/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

~ helm install capsule . -n capsule-system --create-namespace 
NAME: capsule
LAST DEPLOYED: Tue Feb 14 17:34:56 2023
NAMESPACE: capsule-system
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
...

~ k create -f - << EOF
apiVersion: capsule.clastix.io/v1beta2
kind: Tenant
metadata:
  name: oil
spec:
  owners:
  - name: alice
    kind: User
EOF
tenant.capsule.clastix.io/oil created

~ k get tenants
NAME   STATE    NAMESPACE QUOTA   NAMESPACE COUNT   NODE SELECTOR   AGE
oil    Active                     0                                 6s

~ ../../hack/create-user.sh alice oil
creating certs in TMPDIR /var/folders/c7/78_t4pvj5zd2qrcwgq05h7_40000gn/T/tmp.EC4Ogyzl
merging groups /O=capsule.clastix.io
Generating RSA private key, 2048 bit long modulus
......................................................................+++
.+++
e is 65537 (0x10001)
certificatesigningrequest.certificates.k8s.io/alice-oil created
certificatesigningrequest.certificates.k8s.io/alice-oil approved
kubeconfig file is: alice-oil.kubeconfig
to use it as alice export KUBECONFIG=alice-oil.kubeconfig

~ export KUBECONFIG=alice-oil.kubeconfig
~ k create namespace oil-development
namespace/oil-development created

~ export KUBECONFIG=
~ k get tenant oil
NAME   STATE    NAMESPACE QUOTA   NAMESPACE COUNT   NODE SELECTOR   AGE
oil    Active                     1                                 31s

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[prometherion]

It makes sense to me to have the same securityContextContraints as we have with the controller.

LGTM, thanks @zvlb! 🚀