add support for namespace search-attributes

[Dariusch]

What was changed

I am adding support for adding search attributes while creating a namespace.

Why?

We recently migrated to the temporal chart and missed the option to include the previously used config.

Checklist

1. How was this tested:

values:

server:
  config:
    namespaces:
      # Enable this to create namespaces
      create: true
      namespace:
        - name: default
          retention: 3d
          searchAttributes: []
        - name: non-default
          retention: 3d
          searchAttributes:
            - name: my_keyword
              type: Keyword
            - name: my_keyword2
              type: Keyword

output:

        - name: create-default-namespace
          image: "temporalio/admin-tools:1.25.1-tctl-1.18.1-cli-1.1.0"
          imagePullPolicy: IfNotPresent
          command: ['/bin/sh','-c']
          args: ['temporal operator namespace describe -n default || temporal operator namespace create -n default --retention 3d']
          env:
            - name: TEMPORAL_ADDRESS
              value: "release-name-temporal-frontend.rmt.svc:7233"
        - name: create-non-default-namespace
          image: "temporalio/admin-tools:1.25.1-tctl-1.18.1-cli-1.1.0"
          imagePullPolicy: IfNotPresent
          command: ['/bin/sh','-c']
          args: ['temporal operator namespace describe -n non-default || temporal operator namespace create -n non-default --retention 3d']
          env:
            - name: TEMPORAL_ADDRESS
              value: "release-name-temporal-frontend.rmt.svc:7233"
        - name: create-non-default-search-attributes
          image: "temporalio/admin-tools:1.25.1-tctl-1.18.1-cli-1.1.0"
          imagePullPolicy: IfNotPresent
          command: ['/bin/sh','-c']
          args: ['temporal operator search-attribute create --namespace non-default --name my_keyword --type Keyword --name my_keyword2 --type Keyword']
          env:
            - name: TEMPORAL_ADDRESS
              value: "release-name-temporal-frontend.rmt.svc:7233"
      containers:
        - name: done
          image: "temporalio/admin-tools:1.25.1-tctl-1.18.1-cli-1.1.0"
          imagePullPolicy: IfNotPresent
          command: ['sh', '-c', 'echo "Store setup completed"']

2. Any docs updates needed?

No, its an optional opt-in.

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[robholland]

Search attributes do not belong to namespaces on self-hosted Temporal.

I'm happy to include this feature, but it needs to be separated from any namespace related code.

[Dariusch]

What do you mean?

Afaik according to the docs they are namespace scoped.

I would be happy to change the PR if you could point me in the right direction.