fix: speed up CI

[maxday]

Speeds up the Runtime Interface Client (RIC) CI by running each architecture on a native GitHub runner instead of cross-building both architectures on a single x86_64 runner under QEMU emulation.

Previously the build and smoke-test jobs ran on ubuntu-latest and used QEMU to emulate linux/arm64/v8. Under emulation mvn install recompiles curl for aarch64, which took ~30 minutes. This PR splits the work per-architecture so the aarch64 half runs on a native ARM runner (ubuntu-24.04-arm), eliminating the emulation cost.

Results:

Measured on the RIC PR workflow (both jobs run in parallel, so the reported wall-clock is the longest job).

Job	Before (QEMU, single x86_64 runner)	After (native runners)
build	44m 06s	x86_64: 5m 31s · aarch64: 4m 47s
smoke-test	45m 51s	x86_64: 8m 55s · aarch64: 9m 24s
Workflow wall-clock	~46 min	~13 min

Net gain: ~33 minutes faster (~71% reduction) in end-to-end CI time. The bulk of the saving comes from smoke-test, which dropped from ~46 min to ~9 min (~37 min, ~80% faster) by eliminating the emulated aarch64 curl recompile.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.79%. Comparing base (b668333) to head (884dd85).

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #634      +/-   ##
============================================
+ Coverage     65.38%   65.79%   +0.40%     
- Complexity      212      213       +1     
============================================
  Files            34       34              
  Lines           991      991              
  Branches        143      143              
============================================
+ Hits            648      652       +4     
+ Misses          290      287       -3     
+ Partials         53       52       -1     

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[fabisev]

Nice speedup!

One thing I noticed is that making build and smoke-test matrix jobs changes the check names to build (x86_64) etc. Main requires a check named just build, so it's stuck pending.
One thing I did for the build-integration-test.yml workflow is:

build:
    needs: build-arch
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: Check build results
        run: |
          if [ "${{ needs.build-arch.result }}" != "success" ]; then
            echo "Build failed on one or more architectures"
            exit 1
          fi
          

So a build-arch job with a build job aggregator, that would keep the build check reporting without touching the branch protection.

[darklight3it]

Nice but I think we need to check something more here for example this. I think we can probably get rid of it and all the dockeremu pipeline right?

aws-lambda-java-libs/aws-lambda-java-runtime-interface-client/pom.xml

Line 46 in 6cdbbdc

<!--

[maxday]

@darklight3it I think your comment got truncated?
I agree there's more cleanup we could do, but this PR delivers a huge performance win on its own, and I'd love to get it merged ASAP so we can start benefiting from it. We can then handle the remaining QEMU config in follow-up PRs. WDYT? I've tackled par of the removal in #633

[darklight3it]

@maxday fine for me as long as we create the new PR immediately I don't want dead code to stay long. The package is already huge and confusing.