[KT-70029] Allow setting of configFile

[omarismail94]

The tasks:

"wasmJsBrowserDevelopmentWebpack",
"wasmJsBrowserDevelopmentRun",
"wasmJsBrowserProductionWebpack",
"wasmJsBrowserProductionRun",

of type KotlinWebpack have the same output configFile file:

projectBuildDir/js/packages/projectName-wasm-js/webpack.config.js

I want to be able to set these to different locations.