rename legacy PS module_utils to remove PowerShell prefix (#27495)

lib/ansible/executor/module_common.py

@@ -791,7 +791,7 @@ def _find_module_utils(module_name, b_module_data, module_path, module_args, tas
         for line in lines:
             # legacy, equivalent to #Requires -Modules powershell
             if REPLACER_WINDOWS in line:
-                module_names.add(b'Ansible.ModuleUtils.PowerShellLegacy')
+                module_names.add(b'Ansible.ModuleUtils.Legacy')
             line_match = requires_module_list.match(line)
             if line_match:
                 module_names.add(line_match.group(1))

test/integration/targets/win_module_utils/library/camel_conversion_test.ps1

@@ -1,6 +1,6 @@
 #!powershell
 
-#Requires -Module Ansible.ModuleUtils.PowerShellLegacy
+#Requires -Module Ansible.ModuleUtils.Legacy
 #Requires -Module Ansible.ModuleUtils.CamelConversion
 
 $ErrorActionPreference = 'Continue'

test/integration/targets/win_module_utils/library/legacy_only_new_way.ps1

@@ -1,5 +1,5 @@
 #!powershell
 
-#Requires -Module Ansible.ModuleUtils.PowerShellLegacy
+#Requires -Module Ansible.ModuleUtils.Legacy
 
 Exit-Json @{ data="success" }

test/integration/targets/win_module_utils/library/uses_local_utils.ps1

@@ -1,7 +1,7 @@
 #!powershell
 
 # use different cases, spacing and plural of 'module' to exercise flexible powershell dialect
-#ReQuiReS   -ModUleS    Ansible.ModuleUtils.PowerShellLegacy
+#ReQuiReS   -ModUleS    Ansible.ModuleUtils.Legacy
 #Requires -Module Ansible.ModuleUtils.ValidTestModule
 
 $o = CustomFunction