Removal of task cleanFrontend

[v1nc3n4]

The idea behind this removal is to optimize build time when Gradle clean task is executed, and prevent unconditional execution of tasks installNode, resolvePackageManager, installPackageManager, installFrontend.

Projects using the cleanScript property would have to migrate to one of the following workaround:

1. Create a custom task to clean the project with a Node.js-based command:

tasks.register<Run[Node|Npm|Pnpm|Yarn]TaskType>("cleanFrontend") {
    // Assuming package.json file contains a script named "clean".
    args.set("run clean")
    // Optionally
    dependsOn("installFrontend")
}

2. Or configure Gradle clean task to remove additional files and/or directories:

tasks.named<Delete>("clean") {
    delete(/* additional files or directories */)
}

Assumption is made that few projects actually used the cleanScript property, and would be impacted by such removal.