VMware: Add option to modify disk type while cloning template (#47859)

* Add parameters to module vmware_guest for conversion of disk to thin or thick when vm is cloned or deployed with template

* unit test for convert clone vm

Co-Authored-By: chris93111 <christopheferreira@ymail.com>

lib/ansible/modules/cloud/vmware/vmware_guest.py

@@ -336,6 +336,11 @@ options:
     - For example, when user has different datastore or datastore cluster for templates and virtual machines.
     - Please see example for more usage.
     version_added: '2.7'
+  convert:
+    description:
+    - Specify convert disk type while cloning template or virtual machine.
+    choices: [ thin, thick, eagerzeroedthick ]
+    version_added: '2.8'
 extends_documentation_fragment: vmware.documentation
 '''
 
@@ -2080,6 +2085,22 @@ class PyVmomiHelper(PyVmomi):
                     relospec.host = self.select_host()
                 relospec.datastore = datastore
 
+                # Convert disk present in template if is set
+                if self.params['convert']:
+                    for device in vm_obj.config.hardware.device:
+                        if hasattr(device.backing, 'fileName'):
+                            disk_locator = vim.vm.RelocateSpec.DiskLocator()
+                            disk_locator.diskBackingInfo = vim.vm.device.VirtualDisk.FlatVer2BackingInfo()
+                            if self.params['convert'] in ['thin']:
+                                disk_locator.diskBackingInfo.thinProvisioned = True
+                            if self.params['convert'] in ['eagerzeroedthick']:
+                                disk_locator.diskBackingInfo.eagerlyScrub = True
+                            if self.params['convert'] in ['thick']:
+                                disk_locator.diskBackingInfo.diskMode = "persistent"
+                            disk_locator.diskId = device.key
+                            disk_locator.datastore = datastore
+                            relospec.disk.append(disk_locator)
+
                 # https://www.vmware.com/support/developer/vc-sdk/visdk41pubs/ApiReference/vim.vm.RelocateSpec.html
                 # > pool: For a clone operation from a template to a virtual machine, this argument is required.
                 relospec.pool = resource_pool
@@ -2352,6 +2373,7 @@ def main():
         customization_spec=dict(type='str', default=None),
         vapp_properties=dict(type='list', default=[]),
         datastore=dict(type='str'),
+        convert=dict(type='str', choices=['thin', 'thick', 'eagerzeroedthick']),
     )
 
     module = AnsibleModule(argument_spec=argument_spec,