Remove `HyperlightPEB::code_ptr` #694

Job	Run time
release-blocker-check / check-blockers	7s
build-rust-windows	4m 21s
build-rust-ubuntu	1m 20s
build-guest-binaries / build-guest-binaries (hyperlight-kvm-release)	1s
build-guest-binaries / build-guest-binaries (hyperlight-kvm-debug)	1s
benchmarks	0s
publish	1s
cargo-publish	-1s
	5m 50s

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