Support AcceptAndGetNext for Forward/ReverseSearchHistory

[sharpchen]

PR Summary

Resolves PowerShell#514
Depends on PowerShell#5208

The solution is simple, just assign _getNextHistoryIndex a value when searching(UpdateHistoryDuringInteractiveSearch), and the value will be used to load next history on the next loop.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure you've added one or more new tests
• Make sure you've tested these changes in terminals that PowerShell is commonly used in (i.e. conhost.exe, Windows Terminal, Visual Studio Code Integrated Terminal, etc.)
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed at PowerShell-Docs
    • Doc Issue filed: