feat: Add `get_provenance_cert_chain` to `Reader` #2603

Job	Run time
Preflight docs.rs build	2m 2s
Enforce Rust code format	13s
License / vulnerability audit (advisories)	23s
Clippy	2m 48s
License / vulnerability audit (bans licenses sources)	21s
Preflight crate publish (ubuntu-latest, stable)	1m 15s
Unit tests with minimum versions of direct dependencies (windows-latest)	4m 30s
Unit tests with minimum versions of direct dependencies (macos-latest)	2m 33s
Unit tests (windows-latest, stable)	5m 29s
Unit tests with minimum versions of direct dependencies (ubuntu-latest)	1m 58s
Unit tests (WASM)	2m 24s
Unit tests (aarch64-unknown-linux-gnu, stable)	5m 3s
Unit tests (windows-latest, 1.74.0)	4m 47s
Unit tests (aarch64-unknown-linux-gnu, 1.74.0)	5m 15s
Unit tests (macos-latest, stable)	3m 1s
Check for unused dependencies	2m 11s
Ensure (MINOR) tag is used when making an API breaking change	4m 35s
Unit tests (macos-latest, 1.74.0)	3m 14s
Unit tests (ubuntu-latest, stable)	4m 24s
Unit tests (ubuntu-latest, 1.74.0)	4m 41s
	1h 1m 7s

Provide feedback