sessions - hide some menu and commands that do not apply (#307172)

* sessions - hide some menu and commands that do not apply

* sessions - add precondition to OpenRecentAction to hide from Command Palette in Sessions windows

Agent-Logs-Url: https://github.com/microsoft/vscode/sessions/ef0f26b8-aae6-464e-8633-650caebae42a

Co-authored-by: bpasero <900690+bpasero@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bpasero <900690+bpasero@users.noreply.github.com>