fix: move product.overrides resolution to an earlier stage

[deepak1556]

product values used within main.ts before startup, ex: product.dataFolderName in

vscode/src/main.ts

Line 436 in 7a1d7c4

let dataFolderName = product.dataFolderName;

don't get the values from override since resolution of the file happens in bootstrap-esm. This came up as a bug, when we tried to read an incorrect argv file in

vscode/src/vs/code/electron-main/app.ts

Line 1427 in 7a1d7c4

const argvContent = await this.fileService.readFile(this.environmentMainService.argvResource);