insertModeKeyBindings are unusable on mac & linux

Nobody has claimed this yet.

Type: Bug

Describe the bug
When inserting text there is a visual artifact where the line entire drops down about 1/2 of the line hight and the cursor jumps back 2-3 characters every time I hit the space key.

To Reproduce

Install version 1.17.0 or later of the vim extension in VSCode on Mac
Hit i to enter insert mode
Type a word and then press space
For about 1 second, the line will drop down by about half of a line-height and the cursor will jump backward 2-3 characters.

A screen cast of this issue can be viewed here.

Note that this occurs even when I've disabled all other extensions, and this issue has occurred consistently since the release of 1.17.0. I've stayed on 1.16.0 since 1.17.0 was released but am getting annoyed as some of the bugs in 1.16.0 and would prefer to upgrade to the latest version, but this bug makes VSCode VIM almost unusable.

Extension version: 1.16.0
VS Code version: Code 1.78.2 (Universal) (b3e4e68a0bc097f0ae7907b217c1119af9e03435, 2023-05-10T14:44:45.204Z)
OS version: Darwin x64 22.4.0
Modes:
Sandboxed: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz (16 x 2300)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	2, 2, 3

A/B Experiments

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azure-dev_surveyone:30548225
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pyind779:30671433
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vsccsb:30705552
pythonms35:30701012
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pythonfmttext:30731395
pythoncmv:30739700
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pythongtdpath:30739704

Start by reproducing the issue in the VS Code Vim extension on macOS or Linux: enter insert mode, type a word, and press space. Inspect the insertModeKeyBindings handling and the editor interaction around cursor movement and line rendering; done means typing spaces no longer causes the visual line drop or cursor jump.

Written by the indexing model from the issue text.

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