Fix playwright mental model, don't make me psycho, thanks (#5680)

* Fix flakey tests with new toolbar.exitSketch

* tsc && lint && fmt

* Disable pw electron thing again

* Unfrig Playwright-Electron a ton; fix another ton of flakes.

* More deflaky

* Fix a ton of tests and playwright related hell

* Run jess's magic incantation to build rust kcl things

* yarn tsc

* yarn lint

* yarn fmt

* Remove double logs

* Revert to old settings spreads momentarily

* Expect error *in the fixtureSetup*, does not circumvent typechecking for regular usage

* Fix unit tests

e2e/playwright/fixtures/cmdBarFixture.ts

@@ -27,28 +27,19 @@ type CmdBarSerialised =
 
 export class CmdBarFixture {
   public page: Page
-
-  get cmdBarOpenBtn() {
-    return this.page.getByTestId('command-bar-open-button')
-  }
-
-  get cmdBarElement() {
-    return this.page.getByTestId('command-bar')
-  }
+  public cmdBarOpenBtn!: Locator
+  public cmdBarElement!: Locator
 
   constructor(page: Page) {
     this.page = page
+    this.cmdBarOpenBtn = this.page.getByTestId('command-bar-open-button')
+    this.cmdBarElement = this.page.getByTestId('command-bar')
   }
 
   get currentArgumentInput() {
     return this.page.getByTestId('cmd-bar-arg-value')
   }
 
-  // Put all selectors here because this method is re-run on fixture creation.
-  reConstruct = (page: Page) => {
-    this.page = page
-  }
-
   private _serialiseCmdBar = async (): Promise<CmdBarSerialised> => {
     if (!(await this.page.getByTestId('command-bar-wrapper').isVisible())) {
       return { stage: 'commandBarClosed' }