CI: Add more Debian packages to the llvm-passes rootfs image (#41544)

* Add `less` to the `llvm-passes` rootfs image

Also, sort the entries of `packages` in alphabetical order.

* Update llvm-passes.jl

(cherry picked from commit 516af1b)

.buildkite/rootfs_images/llvm-passes.jl

@@ -8,18 +8,20 @@ include("rootfs_utils.jl")
 
 # Build debian-based image with the following extra packages:
 packages = [
+ "bash",
  "build-essential",
+ "cmake",
+ "curl",
+ "gfortran",
+ "git",
+ "less",
  "libatomic1",
+ "m4",
+ "perl",
+ "pkg-config",
  "python",
  "python3",
- "gfortran",
- "perl",
  "wget",
- "m4",
- "cmake",
- "pkg-config",
- "curl",
- "git",
 ]
 tarball_path = debootstrap("llvm-passes"; packages)