feat(toolchain): support getrandom v0.2 and v0.3 simultaneously

[jonathanpwang]

With the v1.3.0-rc release, we moved to supporting getrandom v0.3. However some libraries like ecdsa still use getrandom v0.2 and it would give the unsupported backend error.

Turns out it is possible to support both simultaneously.

Closes INT-4187

[Copilot]

Pull Request Overview

This PR aims to support both getrandom v0.2 and v0.3 simultaneously so that libraries still using getrandom v0.2 (e.g., ecdsa) do not trigger an unsupported backend error.

• Updated test cases to pass a program name parameter for getrandom and getrandom_v02
• Added a new example program for getrandom_v02 and updated compile error directives
• Adjusted Cargo.toml and custom getrandom registrations to include getrandom-v02 support

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
extensions/rv32im/tests/src/lib.rs	Updated test cases to include getrandom_v02 as program input
extensions/rv32im/tests/programs/examples/getrandom_v02.rs	Added new example program for getrandom v0.2
extensions/rv32im/tests/programs/examples/getrandom.rs	Added compile error directive for getrandom-v02 compatibility
extensions/rv32im/tests/programs/Cargo.toml	Included getrandom-v02 dependency and updated feature config
crates/toolchain/openvm/src/getrandom.rs	Added custom registration for getrandom_v02
crates/toolchain/openvm/Cargo.toml	Updated dependencies and feature definitions for getrandom-v02

Comments suppressed due to low confidence (1)

extensions/rv32im/tests/src/lib.rs:281

• [nitpick] There is an inconsistency in naming between the program identifier 'getrandom_v02' (with an underscore) and the feature flag 'getrandom-v02' (with a hyphen). Consider aligning these naming conventions for clarity.

    #[test_case("getrandom_v02", vec!["getrandom-v02", "getrandom-unsupported"])]

[github-actions]

group	app.proof_time_ms	app.cycles	app.cells_used	leaf.proof_time_ms	leaf.cycles	leaf.cells_used
verify_fibair	(+12 [+1.0%]) 1,202	322,699	17,340,132	-	-	-
fibonacci	(+25 [+0.9%]) 2,667	1,500,277	50,589,503	-	-	-
regex	(+43 [+0.5%]) 7,924	4,165,226	166,511,152	-	-	-
ecrecover	1,142	136,241	8,089,270	-	-	-
pairing	(-67 [-1.5%]) 4,480	1,862,964	97,277,783	-	-	-

Commit: 0781ff5

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