Added namespace to all resources in the helm chart and added tests to ensure that coder can be deployed in non-default namespaces, as specified via the namespace flag in the helm command.
Ways to verify this:
- current state:
```bash
$ helm template my-coder coder -n coder --version 2.19.0 --repo https://helm.coder.com/v2 | yq '.metadata.namespace'
null
---
null
---
null
---
null
---
null
```
- fixed state when checking out this PR:
```bash
$ helm template my-coder ./helm/coder -n coder --set coder.image.tag=latest | yq '.metadata.namespace'
coder
---
coder
---
coder
---
coder
---
coder
```
Change-Id: Ib66d4be9bcc4984dfe15709362e1fe0dcd3e847f
Signed-off-by: Thomas Kosiewski <tk@coder.com>
