[support-bundle] include for large log files (#8771)

@wfchandler noticed an error in a collected support bundle where we
failed to copy a large (31GB) log file.
We need to turn on [large file
support](https://docs.rs/zip/latest/zip/write/struct.FileOptions.html#tymethod.large_file)
if we wish to include these files.

```
03:21:25.519Z ERRO SledAgent: Failed to write service log to zip file: Large file option has not been set
    file = sled-diagnostics/src/logs.rs:725
    log = /pool/ext/1f91451d-a466-4c9a-a6e6-0abd7985595f/crypt/debug/.zfs/snapshot/sled-diagnostics-fJX7Qry22VZX/oxz_crucible_76fe2161-90df-41b5-9c94-067de9c29db1/oxide-crucible-downstairs:downstairs-430d51d9-bad0-4dda-bd3b-548f176a9b51.log.1754362713
    service = crucible-downstairs
    sled_id = 2c33e8ef-ae07-4191-804d-52a1840ce53c
```

Author: papertigers

nexus/src/app/background/tasks/support_bundle_collector.rs

@@ -1158,7 +1158,9 @@ fn recursively_add_directory_to_zipfile(
 
         let file_type = entry.file_type()?;
         if file_type.is_file() {
-            let opts = FullFileOptions::default();
+            let opts = FullFileOptions::default()
+                .compression_method(zip::CompressionMethod::Deflated)
+                .large_file(true);
             let src = entry.path();
 
             zip.start_file_from_path(dst, opts)?;

sled-diagnostics/src/logs.rs

@@ -720,7 +720,13 @@ fn write_log_to_zip<W: Write + Seek>(
         zip_path,
         FullFileOptions::default()
             .compression_method(zip::CompressionMethod::Zstd)
-            .compression_level(Some(3)),
+            .compression_level(Some(3))
+            // NB: From the docs
+            // If set to false and the file exceeds the
+            // limit, an I/O error is thrown and the file is aborted. If set to
+            // true, readers will require ZIP64 support and if the file does not
+            // exceed the limit, 20 B are wasted.
+            .large_file(true),
     )?;
     if let Err(e) = std::io::copy(&mut src, zip) {
         // If we fail here the `ZipWriter` is an unknown state and we are forced