Windows Terminal input is as slow as rubber cement

### Windows Terminal version

1.11.2921.0

### Windows build number

10.0.22000.318

### Other Software

My environment:

* VMware Fusion version 12.1.1
* macOS Monterey 12.0.1
* 2.2 GHz 6-Core Intel Core i7 CPU (as reported by About This Mac)
* 16 GB host memory

The virtual machine specs:

* 4 cores (the Windows 10 minimum)
* 8 GB RAM

### Steps to reproduce

I am currently running the Visual Studio installer in this VM, placing it under heavy load (100% CPU utilization in Task Manager). If I type anything when the machine is this loaded, the input response time is unusably slow. It is so slow that if I alt-tab away from the terminal, I worry that my inputs might be sent to another program because the terminal hasn't processed them yet. Not being able to alt-tab away after typing a command is a serious productivity blocker for me.

### Expected Behavior

The input latency being as fast as any other program on the VM at this heavy a load. (Try filling out a bug report form in Microsoft Edge under these circumstances, like I'm doing. The input latency there is as fast and as responsive as I expect.)

### Actual Behavior

Enough time for me to enter a complete command line before the first character appears onscreen. The arrow keys, Backspace, and Ctrl+C are also processed this slowly. (I am a fast typist, but my hand-eye coordination isn't what it used to be; I make many typos while writing text.)

Start by reproducing the input-latency problem in Windows Terminal 1.11.2921.0 with the stated Windows VM configuration while the Visual Studio installer drives CPU usage to 100%. Compare typing, arrow keys, Backspace, and Ctrl+C with another program under the same load; done means terminal input responds promptly without delayed or misdirected keystrokes.

Written by the indexing model from the issue text.