Feature gates for rbpf v0.2.16 (#21590)

- Adds feature reject_section_virtual_address_file_offset_mismatch.
- Adds feature start_verify_shift32_imm.
- Enables enable_symbol_and_section_labels only in the rbpf-cli.

rbpf-cli/src/main.rs

@@ -152,6 +152,7 @@ native machine code before execting it in the virtual machine.",
 
     let config = Config {
         enable_instruction_tracing: matches.is_present("trace") || matches.is_present("profile"),
+        enable_symbol_and_section_labels: true,
         ..Config::default()
     };
     let loader_id = bpf_loader::id();