Remove location from scaffolded app (#5600)

# Description
Removing location from scaffolded application. `app.bicep` has location
but docs don't show location in the `app.bicep`.

## Issue reference
Fixes: #5601

## Checklist

Please make sure you've completed the relevant tasks for this PR, out of
the following list:

* [ ] Code compiles correctly
* [ ] Adds necessary unit tests for change
* [ ] Adds necessary E2E tests for change
* [ ] Unit tests passing
* [ ] Extended the documentation / Created issue for it

## Auto-generated summary

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### <samp>🤖 Generated by Copilot at ea6ec87</samp>

### Summary
🗑️🛠️📝

<!--
1. 🗑️ - This emoji conveys the idea of removing or deleting something,
which is what the first change did by removing an unnecessary field from
the `rad-config.yaml` template.
2. 🛠️ - This emoji conveys the idea of fixing or repairing something,
which is what the second change did by fixing the comment indentation in
the `rad.yaml` template.
3. 📝 - This emoji conveys the idea of writing or editing something,
which is what both changes did by modifying the code of the templates.
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Simplified and improved `rad` CLI setup command by removing unused field
and fixing comment indentation in config templates.

> _`rad-config.yaml`_
> _Simpler and clearer now_
> _Autumn leaves of code_

### Walkthrough
* Remove redundant location field from rad-config.yaml template
([link](https://github.com/project-radius/radius/pull/5600/files?diff=unified&w=0#diff-1b0ac5c011aaaf6673a23365f05fe4d2ebdc793c135984d7b3410e59ef92fa75L33))
* Fix indentation of comment explaining trailing newline in rad.yaml
template
([link](https://github.com/project-radius/radius/pull/5600/files?diff=unified&w=0#diff-1b0ac5c011aaaf6673a23365f05fe4d2ebdc793c135984d7b3410e59ef92fa75L46-R49))

(cherry picked from commit c715d39)

pkg/cli/setup/application.go

@@ -27,7 +27,6 @@ param application string
 
 resource demo 'Applications.Core/containers@2022-03-15-privatepreview' = {
   name: 'demo'
-  location: 'global'
   properties: {
     application: application
     container: {
@@ -40,11 +39,11 @@ resource demo 'Applications.Core/containers@2022-03-15-privatepreview' = {
     }
   }
 }
-`  // Trailing newline intentional.
+` // Trailing newline intentional.
 
 	radYamlTemplate = `workspace:
   application: %q
-`  // Trailing newline intentional.
+` // Trailing newline intentional.
 )
 
 // ScaffoldApplication creates a working sample application in the provided directory