Rust

Improve CBOR structures for Identity #18230

Job	Run time
Rust - lint_cargo_readme	45s
Rust - lint_cargo_fmt_check	50s
Rust - lint_cargo_clippy	4m 5s
Rust - lint_cargo_deny	1m 12s
Rust - lint_cargo_toml_files	58s
Rust - build	1m 59s
Rust - check_cargo_update	48s
Rust - lint_docs_ockam_io_rust_examples	37s
Rust - build_docs	1m 18s
Rust - check_no_std	1m 32s
Rust - build_examples	2m 1s
Rust - check_nightly	2m 10s
Rust - build_nightly	2m 36s
Rust - ockam_command_cross_build (linux_armv7)	7m 34s
Rust - build_release	5m 48s
Rust - ockam_command_cross_build (macos_silicon)	12m 27s
Rust - test	7m 4s
Rust - test_nightly	8m 46s
Rust - test_docs_rust_library_examples	0s
Rust - test_ockam_command (linux_86)	4m 26s
	1h 6m 56s

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