Replaced IoError::new calls that still had Span::unknown() (#14968)

<!--
if this PR closes one or more issues, you can automatically link the PR
with
them by using one of the [*linking
keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword),
e.g.
- this PR should close #xxxx
- fixes #xxxx

you can also mention related issues, PRs or discussions!
-->

# Description
<!--
Thank you for improving Nushell. Please, check our [contributing
guide](../CONTRIBUTING.md) and talk to the core team before making major
changes.

Description of your pull request goes here. **Provide examples and/or
screenshots** if your changes affect the user experience.
-->

It seems in my PR #14927 I missed a few calls to `IoError::new` that had
`Span::unknown` inside them, which shouldn't be used but rather
`IoError::new_internal`. I replaced these calls.

Thanks to @132ikl to finding out that I forgot some. 😄 

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

Pretty much none really.

# Tests + Formatting
<!--
Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used` to
check that you're using the standard code style
- `cargo test --workspace` to check that all tests pass (on Windows make
sure to [enable developer
mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging))
- `cargo run -- -c "use toolkit.nu; toolkit test stdlib"` to run the
tests for the standard library

> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```
-->

- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting
<!-- If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
-->

crates/nu-engine/src/env.rs

@@ -220,9 +220,10 @@ pub fn current_dir(engine_state: &EngineState, stack: &Stack) -> Result<PathBuf,
     // we still need to simplify Windows paths. "." is safe because `cwd` should
     // be an absolute path already.
     canonicalize_with(&cwd, ".").map_err(|err| {
-        ShellError::Io(IoError::new(
+        ShellError::Io(IoError::new_internal_with_path(
             err.kind(),
-            Span::unknown(),
+            "Could not canonicalize current dir",
+            nu_protocol::location!(),
             PathBuf::from(cwd),
         ))
     })
@@ -239,9 +240,10 @@ pub fn current_dir_const(working_set: &StateWorkingSet) -> Result<PathBuf, Shell
     // we still need to simplify Windows paths. "." is safe because `cwd` should
     // be an absolute path already.
     canonicalize_with(&cwd, ".").map_err(|err| {
-        ShellError::Io(IoError::new(
+        ShellError::Io(IoError::new_internal_with_path(
             err.kind(),
-            Span::unknown(),
+            "Could not canonicalize current dir",
+            nu_protocol::location!(),
             PathBuf::from(cwd),
         ))
     })

crates/nu-plugin-core/src/communication_mode/mod.rs

@@ -218,10 +218,10 @@ impl PreparedServerCommunication {
                                 if !is_would_block_err(&err) {
                                     // `WouldBlock` is ok, just means it's not ready yet, but some other
                                     // kind of error should be reported
-                                    return Err(ShellError::Io(IoError::new(
+                                    return Err(ShellError::Io(IoError::new_internal(
                                         err.kind(),
-                                        Span::unknown(),
-                                        None,
+                                        "Accepting new data from listener failed",
+                                        nu_protocol::location!(),
                                     )));
                                 }
                             }