feat: add args support to helm chart

[rowansmithau]

adds support for specifying runtime arguments via the helm chart in case they are not exposed as env vars natively in the chart.

Current state:

coder@white-meadowlark-38:~/coder-logstream-kube$ helm template coder-logstream-kube helm | grep -A10 'containers:'
      containers:
        - name: coder-logstream-kube
          image: "ghcr.io/coder/coder-logstream-kube:0.1.0"
          imagePullPolicy: IfNotPresent
          command:
            - /coder-logstream-kube
          resources: 
            {}
          env:
            - name: CODER_URL
              value: 

And with this added:

coder@white-meadowlark-38:~/coder-logstream-kube$ helm template coder-logstream-kube helm/ --set 'args[0]=-l' --set 'args[1]=com.coder.deployment=dev-coder.mcrn.cc' | grep -A10 'containers:'
      containers:
        - name: coder-logstream-kube
          image: "ghcr.io/coder/coder-logstream-kube:0.1.0"
          imagePullPolicy: IfNotPresent
          command:
            - /coder-logstream-kube
          args:
            - -l
            - com.coder.deployment=dev-coder.mcrn.cc
          resources: 
            {}