chore: turn telemetry on by default (#202)

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## Overview/Summary

Turn telemetry on by default for GA

## This PR fixes/adds/changes/removes

N/A

### Breaking Changes

None

## Testing Evidence

Please provide any testing evidence to show that your Pull Request
works/fixes as described and planned (include screenshots, if
appropriate).

## As part of this Pull Request I have

- [x] Checked for duplicate [Pull
Requests](https://github.com/Azure/alz-terraform-accelerator/pulls)
- [x] Associated it with relevant
[issues](https://github.com/Azure/alz-terraform-accelerator/issues), for
tracking and closure.
- [x] Ensured my code/branch is up-to-date with the latest changes in
the `main`
[branch](https://github.com/Azure/alz-terraform-accelerator/tree/main)
- [x] Performed testing and provided evidence.
- [x] Updated relevant and associated documentation.

templates/platform_landing_zone/examples/full-multi-region-nva/hub-and-spoke-vnet.tfvars

@@ -125,7 +125,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---

templates/platform_landing_zone/examples/full-multi-region-nva/virtual-wan.tfvars

@@ -119,7 +119,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---

templates/platform_landing_zone/examples/full-multi-region/hub-and-spoke-vnet.tfvars

@@ -127,7 +127,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---

templates/platform_landing_zone/examples/full-multi-region/virtual-wan.tfvars

@@ -116,7 +116,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---

templates/platform_landing_zone/examples/full-single-region/hub-and-spoke-vnet.tfvars

@@ -99,7 +99,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---

templates/platform_landing_zone/examples/full-single-region/virtual-wan.tfvars

@@ -94,7 +94,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---

templates/platform_landing_zone/examples/management-only/management.tfvars

@@ -66,7 +66,7 @@ custom_replacements = {
   }
 }
 
-enable_telemetry = false
+enable_telemetry = true
 
 /*
 --- Tags ---