ci(common): update protoc setup

[fegmorte]

Description of changes

Update the protoc setup to get rid off action arduino/setup-protoc that is not well maintained.

Issue ticket number and link

PR Checklist

I attest that all checked items are satisfied. Any deviation is clearly justified above.

• Title follows conventional commits (e.g. chore: ...).
• Tests added for every new pub item and test coverage has not decreased.
• Public APIs and non-obvious logic documented; unfinished work marked as TODO(#issue).
• unwrap/expect/panic only in tests or for invariant bugs (documented if present).
• No dependency version changes OR (if changed) only minimal required fixes.
• No architectural protocol changes OR linked spec PR/issue provided.
• No breaking deployment config changes OR devops label + infra notified + infra-team reviewer assigned.
• No breaking gRPC / serialized data changes OR commit marked with ! and affected teams notified.
• No modifications to existing versionized structs OR backward compatibility tests updated.
• No critical business logic / crypto changes OR ≥2 reviewers assigned.
• No new sensitive data fields added OR Zeroize + ZeroizeOnDrop implemented.
• No new public storage data OR data is verifiable (signature / digest).
• No unsafe; if unavoidable: minimal, justified, documented, and test/fuzz covered.
• Strongly typed boundaries: typed inputs validated at the edge; no untyped values or errors cross modules.
• Self-review completed.

Dependency Update Questionnaire (only if deps changed or added)

Answer in the Cargo.toml next to the dependency (or here if updating):

1. Ownership changes or suspicious concentration?
2. Low popularity?
3. Unusual version jump?
4. Lacking documentation?
5. Missing CI?
6. No security / disclosure policy?
7. Significant size increase?

More details and explanations for the checklist and dependency updates can be found in CONTRIBUTING.md

[github-actions]

Consolidated Tests Results 2026-05-19 - 17:32:03

Test Results

7 passed

Details

7 tests
not captured
junit-to-ctrf
build-and-test test-reporter #2246
ci(common): update protoc setup #602

test-reporter: Run #2246

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
7	7	0	0	0	0	0	not captured

🎉 All tests passed!

Tests

View All Tests

Test Name	Status	Flaky	Duration
k8s_test_crs_uniqueness	✅		41.4s
k8s_test_insecure_keygen_encrypt_and_public_decrypt	✅		1m 54s
k8s_test_insecure_keygen_encrypt_multiple_types	✅		2m 6s
k8s_test_keygen_and_crs	✅		1m 55s
k8s_test_keygen_uniqueness	✅		4m 50s
k8s_test_centralized_insecure	✅		52.9s
nightly_full_gen_tests_default_k8s_centralized_sequential_crs	✅		1.6s

_{🍂 No flaky tests in this run.}

Github Test Reporter by CTRF 💚

🔄 This comment has been updated

[Copilot]

Pull request overview

Replaces the third-party arduino/setup-protoc action with an inline curl + sha256sum + unzip install in the shared setup-rust-and-protoc composite action, and removes the now-obsolete protoc-version / protoc-repo-token inputs from every workflow that invoked it. The default protoc version is also bumped from 26.1 to 34.1.

Changes:

• Inline manual download of protoc (Linux x86_64) with a pinned SHA-256, removing the dependency on arduino/setup-protoc and the GitHub-token rate-limit workaround.
• Drop the protoc-repo-token input and stop passing protoc-version / protoc-repo-token from all callers, relying on the action default.
• Bump the default protoc version from 26.1 to 34.1.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
.github/actions/setup-rust-and-protoc/action.yml	Replace arduino/setup-protoc with a manual curl/sha256sum/unzip install; remove protoc-repo-token input; bump default version to 34.1.
.github/workflows/common-testing.yml	Drop now-removed protoc-version / protoc-repo-token inputs.
.github/workflows/kind-testing.yml	Same input cleanup.
.github/workflows/main.yml	Same input cleanup.
.github/workflows/npm-release.yml	Same input cleanup.
.github/workflows/pr-preview-deploy.yml	Same input cleanup.
.github/workflows/rust-lint.yml	Same input cleanup.
.github/workflows/wasm-testing.yml	Same input cleanup.

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[dd23]

LGTM!

[eudelins-zama]

Thx!