test: slightly rewrite getGPUInfo() tests (#14863)

Rewrite GPUInfo tests for linux and update `getGPUInfo` functionality for linux.
`basic` and `complete` GPUInfo is same for linux.

spec/fixtures/api/gpu-info.js

@@ -0,0 +1,17 @@
+const { app } = require('electron')
+
+app.commandLine.appendSwitch('--disable-software-rasterizer')
+
+app.on('ready', () => {
+  const infoType = process.argv.pop()
+  app.getGPUInfo(infoType).then(
+    (gpuInfo) => {
+      console.log(JSON.stringify(gpuInfo))
+      app.exit(0)
+    },
+    (error) => {
+      console.error(error)
+      app.exit(1)
+    }
+  )
+})