[cDAC] Implement AreOptimizationsDisabled for cDAC

[barosiak]

Summary

Implements AreOptimizationsDisabled in the cDAC.

Changes

• Implemented AreOptimizationsDisabled in DacDbiImpl with #if DEBUG legacy validation
• Added Deoptimized field to ILCodeVersionNode data descriptors and managed data class
• Added IsDeoptimized to IReJIT contract interface and implementation
• Added tests and updated ReJIT.md documentation

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[Copilot]

Pull request overview

Implements AreOptimizationsDisabled in the cDAC DacDbiImpl so it no longer needs to fall back to the legacy implementation, and adds the supporting IReJIT.IsDeoptimized contract API plus an ILCodeVersionNode.Deoptimized data field.

Changes:

• Add IsDeoptimized to IReJIT and implement it in ReJIT_1 mirroring ILCodeVersion::IsDeoptimized (synthetic → false; explicit → node field).
• Expose ILCodeVersionNode::m_deoptimized via a new data descriptor entry and managed ILCodeVersionNode.Deoptimized property.
• Implement DacDbiImpl.AreOptimizationsDisabled using cDAC contracts (with #if DEBUG validation against the legacy implementation) and add unit tests for both the contract and DacDbi paths.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/coreclr/vm/codeversion.h	Adds cdac_data<ILCodeVersionNode>::Deoptimized offset entry.
src/coreclr/vm/datadescriptor/datadescriptor.inc	Adds Deoptimized field to the ILCodeVersionNode data descriptor (typed T_BOOL).
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Abstractions/Contracts/IReJIT.cs	Adds default IsDeoptimized method on the IReJIT contract.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Contracts/ReJIT_1.cs	Implements IsDeoptimized for the c1 contract version.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Contracts/Data/ILCodeVersionNode.cs	Reads the new Deoptimized field as uint and exposes it as bool.
src/native/managed/cdac/Microsoft.Diagnostics.DataContractReader.Legacy/Dbi/DacDbiImpl.cs	Implements AreOptimizationsDisabled via contracts with debug-time legacy cross-check.
src/native/managed/cdac/tests/MockDescriptors/MockDescriptors.CodeVersions.cs	Adds Deoptimized field to mock ILCodeVersionNode layout/builder.
src/native/managed/cdac/tests/MockDescriptors/MockDescriptors.ReJIT.cs	Plumbs deoptimized parameter through AddExplicitILCodeVersionNode.
src/native/managed/cdac/tests/ReJITTests.cs	New tests for synthetic/explicit IsDeoptimized behavior.
src/native/managed/cdac/tests/DacDbiImplTests.cs	New tests covering null-output, invalid token, null MethodDesc, and deoptimized/not-deoptimized paths for AreOptimizationsDisabled.
docs/design/datacontracts/ReJIT.md	Documents the new IsDeoptimized API and Deoptimized field.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated no new comments.

[barosiak]

/ba-g unrelated preexisting infrastructure failures