Documentation issue: Configuring C++ toolchains misleading linker invocation

Documentation URL: https://docs.bazel.build/versions/main/tutorial/cc-toolchain-config.html

As this documentation stands it misleads the user into believing that the `ld` stanza of `tool_paths` controls the invocation of the linker, but it doesn't. If you put `/usr/games/cowsay` in for the linker, it still invokes the default host linker. I'm not smart enough to know why yet, but I guess it is because the `features` override things.

It seems to me that if you want to influence the linker, you are required to provide a list of ActionConfigInfo.