Provide convenience symlinks information in `bazel info`

### Description of the feature request:

`bazel info` already provides a way to obtain output_base directory and some significant subdirectories.

Would it be also possible to provide similar information about the convenience symlinks? They can be manipulated with the `--symlink_prefix` flag, so we can't assume their names.

This would be useful for tools like IntelliJ to mark these folders as excluded (from indexing) as early as possible.

### Which category does this issue belong to?

CLI

### What underlying problem are you trying to solve with this feature?

Mark the convenience symlinks as ignored as soon as possible during the IntelliJ sync process

### Which operating system are you running Bazel on?

_No response_

### What is the output of `bazel info release`?

_No response_

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

_No response_

### What's the output of `git remote get-url origin; git rev-parse HEAD` ?

_No response_

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

_No response_

Start by tracing how `bazel info` reports output directories and how `--symlink_prefix` determines convenience symlink names. Define the information needed by IntelliJ to identify those symlinks reliably, then verify that the resulting `bazel info` output reflects custom prefixes and supports early exclusion during sync.

Written by the indexing model from the issue text.