feat: Add UseLocalJobOnlyAttribute and modify related codes

[filzrev]

This PR contains following changes.

1. Add UseLocalJobOnlyAttribute
2. Add ConfigUnionRule.UnionAndUseLocalJob
3. Modify BenchmarkConverter.cs code to handle UnionAndUseLocalJobAttribute.
4. Modify samples benchmarks that using local jobs.

Background
When using global config that contains jobs and benchmark local config also jobs.
Both jobs that are defined by global/local config are executed.
(e,g, When using DebugInProcessConfig as global config. and benchmark has attributes also define jobs)

This PR intended to exclude unnecessary jobs that defined by global config.

[fuguiKz]

Nice addition — I like the intent (let per-type attributes control the jobs, without global/assembly jobs leaking in), and aggregating type attributes into a single config avoids any attribute-ordering surprises.

A couple small suggestions:

• Could we add a unit test to lock in the new ConfigUnionRule.UnionAndUseLocalJob behavior (e.g., global config has jobs + other settings; local config has jobs; expect union keeps global non-job settings but uses only the local jobs)?
• Minor: the InvalidBenchmarkDeclarationException message has a couple typos and could include which attribute set a non-default UnionRule to make it more actionable.
• Optional: if this is meant for end users too (not just samples), it might be worth a short doc note about when to use UseLocalJobOnlyAttribute / UnionAndUseLocalJob.