feat: Add support for REPLs (#2723)

This patch adds a new target that lets users invoke a REPL for a given
`PyInfo` target.

For example, the following command will spawn a REPL for any target
that provides `PyInfo`:
```console
$ bazel run --//python/config_settings:bootstrap_impl=script //python/bin:repl --//python/bin:repl_dep=//tools:wheelmaker
Python 3.11.1 (main, Jan 16 2023, 22:41:20) [Clang 15.0.7 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> import tools.wheelmaker
>>>
```

If the user wants an IPython shell instead, they can create a file like
this:
```python
import IPython
IPython.start_ipython()
```
Then they can set this up in their `.bazelrc` file:
```
# Allow the REPL stub to import ipython. In this case, @my_deps is the name
# of the pip.parse() repository.
build --@rules_python//python/bin:repl_stub_dep=@my_deps//ipython
# Point the REPL at the stub created above.
build --@rules_python//python/bin:repl_stub=//path/to:ipython_stub.py
```

---------

Co-authored-by: Ignas Anikevicius <240938+aignas@users.noreply.github.com>