Remove cargo make pr-flow

[hamza1311]

This task is not what's actually run in CI. During development, it doesn't make sense to run it as it lints and tests everything which is CPU intensive and quite slow. It's better to just test the individual packages where changes are made and let CI handle testing everything (as it already does).

cargo make pr-flow really serves no purpose and can cause problems because everything is compiled together. See #2629 (comment) as an example of a problem it caused

The long, complicated commands such as wasm-pack test and run overwriting macro test outputs can have their own tasks:

packages/yew $ cargo make test
packages/yew-macro $ cargo make test
packages/yew-macro $ cargo make test-overwrite

[siku2]

Yeah the command is mostly a left-over from when it was planned to switch over CI to cargo make as well. I'm in favor of removing it.