init: appease clippy

```
warning: in a `match` scrutinee, avoid complex blocks or closures with blocks; instead, move the block or closure higher and bind it with a `let`
   --> init/src/main.rs:127:23
    |
127 |               match (|| {
    |  _______________________^
128 | |                 let entry = entry.context("read_dir(/bin) failed")?;
129 | |                 let path = entry.path();
130 | |                 let status = std::process::Command::new(&path)
...   |
139 | |                 }
140 | |             })() {
    | |_____________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#blocks_in_conditions
    = note: `#[warn(clippy::blocks_in_conditions)]` on by default
```

https://github.com/rust-lang/rust-clippy/pull/11853 landed in nightly.

init/src/main.rs

@@ -123,8 +123,7 @@ fn run() -> anyhow::Result<()> {
     // Iterate files in /bin.
     let read_dir = std::fs::read_dir("/bin").context("read_dir(/bin) failed")?;
     let errors = read_dir
-        .filter_map(|entry| {
+        .map(|entry| {
-            match (|| {
             let entry = entry.context("read_dir(/bin) failed")?;
             let path = entry.path();
             let status = std::process::Command::new(&path)
@@ -137,10 +136,10 @@ fn run() -> anyhow::Result<()> {
             } else {
                 Err(anyhow::anyhow!("{} failed: {status:?}", path.display()))
             }
-            })() {
+        })
+        .filter_map(|result| match result {
             Ok(()) => None,
             Err(err) => Some(err),
-            }
         })
         .collect::<Vec<_>>();
     if errors.is_empty() {