fix: ensure file type bit is set for rpm bundle (#5459)

By using the `permissions()` method of `FileOptionsBuilder`,
which was added in version 0.20.0 of the `rpm` crate, we fix
a bug where newer versions of `rpm` (the package, not the
crate) would fail when installing the bundle.

Cargo.toml

@@ -239,7 +239,7 @@ image = "0.25.6"
 zip = { version = "4", default-features = false, features = ["deflate"] }
 sha1 = "0.10.6"
 md5 = "0.8.0"
-rpm = { version = "0.19.0", default-features = false, features = ["gzip-compression"] }
+rpm = { version = "0.20.0", default-features = false, features = ["gzip-compression"] }
 lru = "0.16.0"
 async-trait = "0.1.88"
 axum = { version = "0.8.4", default-features = false }