build(before-code-freeze): Align CMake configuration with the other repos (#162)

[mc-nv]

What does the PR do?

• Carries the CMake alignment forward from r26.08 onto main.
• Uses Python3_EXECUTABLE for the gRPC Python codegen; Python_EXECUTABLE is never populated by find_package(Python3), so the codegen ran with no interpreter.
• TRITON_COMMON_ENABLE_PROTOBUF_PYTHON defaults to ON, so this is the default build path.

Checklist

• PR title reflects the change and is of format <commit_type>: <Title>
• Changes are described in the pull request.
• Related issues are referenced.
• Populated github labels field
• Added test plan and verified test passes.
• Verified that the PR passes existing CI.
• Verified copyright is correct on all changed files.
• Added succinct git squash message before merging ref.
• All template sections are filled out.
• Optional: Additional screenshots for behavior/output changes with before/after.

Commit Type:

Check the conventional commit type
box here and add the label to the github PR.

• build
• ci
• docs
• feat
• fix
• perf
• refactor
• revert
• style
• test

Related PRs:

• build(deps): Bump Go example gRPC client dependencies (#919) client#920
• fix: reserve completion-queue slot at enqueue to restore preserve_ordering (#520) core#523
• build(before-code-freeze): Prepare the ONNX Runtime backend for the manylinux base (#352) onnxruntime_backend#358
• build(before-code-freeze): Export the stub's dynamic symbols when libpython is static (#451) python_backend#453
• build: Fix manylinux Python version (#204) pytorch_backend#209
• chore(versions): align tutorials examples with 26.08 release train (#167) tutorials#168
• chore(post-release): advance main to 26.08 upstreams server#8949

Where should the reviewer start?

protobuf/CMakeLists.txt — the two-line variable fix.

Test plan:

• Full CI run on the internal pipeline at TRITON_CONTAINER_VERSION=26.09dev_user, with TRITON_NIGHTLY=1 and TRITON_SBSA=1.

• Local verification: per-repo pre-commit run --files <changed> passes with no auto-fixes.

• CI Pipeline ID:

Caveats:

• Do not merge before the model-repository mount point is rotated: TRITON_SERVER_MODEL_REPO_VERSION derives from TRITON_CONTAINER_VERSION, so 26.09dev must exist on the share first.

Background

Post-release step of the 26.08 train: the default branches move onto the same upstream containers as the just-released r26.08, and pick up the fixes that landed only on the release branch while it stabilised.

Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

• Relates to: TRI-1691

[greptile-apps]

Greptile Summary

Corrects gRPC Python code generation to use the interpreter variable populated by CMake’s Python3 package discovery.

• Replaces find_package(Python ...) with find_package(Python3 ...).
• Invokes grpc_tools.protoc through Python3_EXECUTABLE.

Confidence Score: 5/5

The PR appears safe to merge, with the interpreter command now matching the CMake package used for discovery.

The changed code consistently uses find_package(Python3) and Python3_EXECUTABLE, correcting the previously empty interpreter invocation without altering generated interfaces or package exports.

Important Files Changed

Filename	Overview
protobuf/CMakeLists.txt	Aligns Python interpreter discovery and invocation for gRPC Python code generation; no actionable defects identified.

_{Reviews (1): Last reviewed commit: "build(before-code-freeze): Align CMake c..." | Re-trigger Greptile}