remove rw access to bun cache in nsjail mode

backend/windmill-worker/nsjail/run.bun.config.proto

@@ -156,14 +156,6 @@ mount {
 
 iface_no_lo: true
 
-mount {
-    src: "{CACHE_DIR}"
-    dst: "/tmp/windmill/cache_nomount/bun"
-    is_bind: true
-    mandatory: false
-    rw: true
-}
-
 {SHARED_MOUNT}
 
 envar: "HOME=/tmp/{LANG}"

backend/windmill-worker/src/bun_executor.rs

@@ -1360,7 +1360,6 @@ try {{
             &NSJAIL_CONFIG_RUN_BUN_CONTENT
                 .replace("{LANG}", if annotation.nodejs { "nodejs" } else { "bun" })
                 .replace("{JOB_DIR}", job_dir)
-                .replace("{CACHE_DIR}", BUN_CACHE_DIR)
                 .replace("{CLONE_NEWUSER}", &(!*DISABLE_NUSER).to_string())
                 .replace(
                     "{SHARED_MOUNT}",