Remove azure-arc-containerstorage and azure-arc-acstor. Add cert-manger (#181)

## Purpose
<!-- Describe the intention of the changes being proposed. What problem
does it solve or functionality does it add? -->
* ...

## Does this introduce a breaking change?
<!-- Mark one with an "x". -->
```
[ ] Yes
[ ] No
```

## Pull Request Type
What kind of change does this Pull Request introduce?

<!-- Please check the one that applies to this PR using "x". -->
```
[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:
```

## How to Test
*  Get the code

```
git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install
```

* Test the code
<!-- Add steps to run the tests suite and/or manually test -->
```
```

## What to Check
Verify that the following are valid
* ...

## Other Information
<!-- Add any other helpful information that may be needed here. -->

Author: Mzamankhan

samples/tanzu-config/psa.yaml

@@ -21,15 +21,7 @@ metadata:
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: azure-arc-containerstorage
-  labels:
-    pod-security.kubernetes.io/audit: privileged
-    pod-security.kubernetes.io/enforce: privileged
---- 
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: azure-arc-acstor
+  name: cert-manager
   labels:
     pod-security.kubernetes.io/audit: privileged
     pod-security.kubernetes.io/enforce: privileged
@@ -57,4 +49,4 @@ metadata:
   labels:
     pod-security.kubernetes.io/audit: privileged
     pod-security.kubernetes.io/enforce: privileged
- 
+