Bug 1681140 - python3 - fix malformed \N character escape is-parseable (py3) errors in testing/mozharness/config r=jgraham,marionette-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D98986

testing/mozharness/configs/marionette/windows_taskcluster_config.py

@@ -90,7 +90,7 @@ config = {
             "cmd": [
                 "powershell",
                 "-command",
-                "\"&{$p='HKCU:SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance';if(!(Test-Path -Path $p)){&New-Item -Path $p -Force}&Set-ItemProperty -Path $p -Name Enabled -Value 0}\"",  # noqa
+                r"\"&{$p='HKCU:SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance';if(!(Test-Path -Path $p)){&New-Item -Path $p -Force}&Set-ItemProperty -Path $p -Name Enabled -Value 0}\"",  # noqa
             ],
             "architectures": ["32bit", "64bit"],
             "halt_on_failure": True,

testing/mozharness/configs/web_platform_tests/prod_config_windows_taskcluster.py

@@ -74,7 +74,7 @@ config = {
             "cmd": [
                 "powershell",
                 "-command",
-                "\"&{$p='HKCU:SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance';if(!(Test-Path -Path $p)){&New-Item -Path $p -Force}&Set-ItemProperty -Path $p -Name Enabled -Value 0}\"",  # noqa
+                r"\"&{$p='HKCU:SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance';if(!(Test-Path -Path $p)){&New-Item -Path $p -Force}&Set-ItemProperty -Path $p -Name Enabled -Value 0}\"",  # noqa
             ],
             "architectures": ["32bit", "64bit"],
             "halt_on_failure": True,