Deprecate <target>-specific flags in favour of flags that will be applied to each component built.

Posting from a thread in the Cabal matrix channel:

To be very honest (perhaps controversially), I feel like we should deprecate all of these flags specific to a kind of component (`--enable-executable-profiling` + `--enable-library-profiling` + `--enable-executable-dynamic` + `--enable-executable-static` + `--enable-executable-stripping` + `--enable-library-stripping`, etc...) in favor of flags which are applied to the component being built.

That is, `cabal install --enable-stripping` will strip an executable, `cabal build --enable-stripping` will strip the library...

`--enable-profiling` enables profiling for either the lib or executable target. If the target is `all` then every component gets profiling.

I think it would be just so much simpler both implementation and usability wise.

I often see users simply apply all variations of the flag to get the behaviour they want because it is otherwise not understood how to profile what they want exactly