feat: add experimental --exclude-allocations setting

[not-matthias]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

✅ 7 untouched benchmarks

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_{Comparing cod-3016-add-runneraction-setting-to-exclude-memory-allocators (9f62198) with main (7ce2c98)}

[greptile-apps]

Greptile Summary

This PR adds an experimental option to exclude allocation time from uploaded run metadata. The main changes are:

• New --exclude-allocations CLI flag and environment variable.
• Propagation through run and exec configuration.
• Upload metadata includes the setting only when enabled.
• Default metadata serialization remains unchanged when the option is off.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
src/cli/experimental.rs	Adds the experimental flag and reports it as active only when enabled.
src/executor/config.rs	Adds the allocation-exclusion setting to orchestrator and executor configuration.
src/run_environment/provider.rs	Passes the allocation-exclusion setting into upload metadata.
src/upload/interfaces.rs	Serializes the allocation-exclusion metadata only when the setting is enabled.

_{Reviews (2): Last reviewed commit: "feat: add experimental --exclude-allocat..." | Re-trigger Greptile}