Replace throw with New-InvalidOperationException in DSC_SChannelSettings

[coderabbitai]

Description

Replace the raw throw statement in DSC_SChannelSettings.psm1 (lines 599-600) with New-InvalidOperationException using a localized message.

Changes Needed

1. Add a new localized string key to source/DSCResources/DSC_SChannelSettings/en-US/DSC_SChannelSettings.strings.psd1:

   HotfixNotInstalled = 'Hotfix KB3140245 is not installed. Setting these registry keys will not do anything. Please install the hotfix first.'

2. Replace the throw statement in source/DSCResources/DSC_SChannelSettings/DSC_SChannelSettings.psm1 (lines 599-600):

   # Current:
   throw ('Hotfix KB3140245 is not installed. Setting these registry keys will not do anything. ' + `
           'Please install the hotfix first!')
   
   # Should be:
   New-InvalidOperationException -Message $script:localizedData.HotfixNotInstalled

Context

MOF-based DSC resources must use New-InvalidOperationException instead of raw throw statements for proper error handling, and all user-facing strings must be localized.

References

• PR Pester 5 Migration - Rename resources from MSFT to DSC #66: Pester 5 Migration - Rename resources from MSFT to DSC #66
• Comment: Pester 5 Migration - Rename resources from MSFT to DSC #66 (comment)
• Requested by: @johlju