Run iOS performance measurements on CoreCLR

[kotlarmilos]

Description

This PR runs ios_scenarios (build time, startup, and size)measurements for iOS on CoreCLR.

Successful run: https://dev.azure.com/dnceng/internal/_build/results?buildId=2806045&view=results

Depends on dotnet/runtime#120139.

[Copilot]

Pull Request Overview

This PR enables iOS performance measurements for CoreCLR runtime, extending the existing iOS performance testing infrastructure to support CoreCLR alongside Mono and NativeAOT. It adds configuration for running iOS scenarios (build time, startup, and size measurements) with the CoreCLR runtime.

Key changes:

• Add CoreCLR runtime type support for iOS scenarios
• Update build artifact handling for iOS CoreCLR builds
• Configure pipeline dependencies and artifact downloads for iOS CoreCLR

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
scripts/run_performance_job.py	Adds iOS CoreCLR runtime type detection and flavor configuration
eng/pipelines/upload-build-artifacts-jobs.yml	Configures artifact upload for CoreCLR iOS builds
eng/pipelines/templates/runtime-perf-job.yml	Updates job dependencies and artifact downloads to include iOS CoreCLR
eng/pipelines/runtime-ios-scenarios-perf-jobs.yml	Adds iOS CoreCLR performance job configuration

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[LoopedBard3]

Looks good to me.