Disable pipeline echo (#8292)

# Description

Change behavior of block evaluation to not print result of intermediate
commands.
Previously result of every but last pipeline in a block was printed to
stdout, and last one was returned

![image](https://user-images.githubusercontent.com/17511668/222550110-3f62fbed-432c-4b46-b9b1-4cb45a1f893e.png)
With this change results of intermediate pipelines are discarded after
they finish and the last one is returned as before:

![image](https://user-images.githubusercontent.com/17511668/222550346-f1e74f80-f6b6-4aa3-98d6-888ea4cb4915.png)
Now one should use `print` explicitly to print something to stdout

![image](https://user-images.githubusercontent.com/17511668/222923955-fda0d77b-41b4-4f91-a80f-12b0a1880c05.png)

**Note, that this behavior is not limited to functions!** The scope of
this change are all blocks. All of the below are executed as blocks and
thus exibited this behavior in the same way:

![image](https://user-images.githubusercontent.com/17511668/222924062-342c15de-4273-4bf5-8b39-fe6e3aa96076.png)

With this change outputs for all types of blocks are cleaned:

![image](https://user-images.githubusercontent.com/17511668/222924118-7d51c27e-04bb-43e5-8efe-38b484683bfe.png)


# User-Facing Changes

All types of blocks (function bodies, closures, `if` branches, `for` and
`loop` bodies e.t.c.) no longer print result of intermediate pipelines.

# 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 -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# 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-protocol/src/value/stream.rs

@@ -75,6 +75,20 @@ impl RawStream {
             known_size: self.known_size,
         }
     }
+
+    pub fn drain(self) -> Result<(), ShellError> {
+        for next in self {
+            match next {
+                Ok(val) => {
+                    if let Value::Error { error } = val {
+                        return Err(*error);
+                    }
+                }
+                Err(err) => return Err(err),
+            }
+        }
+        Ok(())
+    }
 }
 impl Debug for RawStream {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -201,6 +215,15 @@ impl ListStream {
             .join(separator)
     }
 
+    pub fn drain(self) -> Result<(), ShellError> {
+        for next in self {
+            if let Value::Error { error } = next {
+                return Err(*error);
+            }
+        }
+        Ok(())
+    }
+
     pub fn from_stream(
         input: impl Iterator<Item = Value> + Send + 'static,
         ctrlc: Option<Arc<AtomicBool>>,