Align Debug/Release with native-only defaults (phase 1)

[Alan-Jowett]

Description

Align Debug/Release behavior with current NativeOnly defaults for phase 1 of JIT/interpreter removal.

Changes in this PR:

• Directory.Build.props: apply DisableJIT=true and DisableInterpreter=true to Debug and Release (while keeping existing NativeOnly* behavior unchanged).
• docs/GettingStarted.md: update build guidance to state that Debug and Release now disable JIT/interpreter by default.

Part of #4997.

Testing

• Built libs\kernel\execution_context_kernel for Debug|x64 and Release|x64 successfully.
• Attempted a broader tests\unit_tests target build; it currently fails with an existing unrelated linker error in ebpfapi (prevail::make_kfunc_call unresolved).

Documentation

Yes. Updated docs/GettingStarted.md to reflect Debug/Release default behavior.

Installation

No installer impact from this change.

[Copilot]

Pull request overview

Aligns the default Debug/Release build behavior with the repository’s existing NativeOnly* defaults as an initial step toward removing JIT/interpreter support (#4997).

Changes:

• Updates Directory.Build.props so Debug and Release also set DisableJIT=true and DisableInterpreter=true.
• Updates docs/GettingStarted.md to reflect the new Debug/Release defaults in build instructions.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
Directory.Build.props	Expands the configuration condition so DisableJIT/DisableInterpreter are enabled for Debug and Release in addition to NativeOnly*.
docs/GettingStarted.md	Updates Getting Started guidance to state Debug/Release now disable JIT/interpreter by default.

[Copilot]

This section is titled as guidance for setting compile-time options from the Developer Command Prompt, but after the edit it no longer explains how to pass these properties to MSBuild (e.g., using /p:DisableJIT=... and /p:DisableInterpreter=...). Consider adding back a concrete command-line example (including how to override the new defaults when needed) so the section remains actionable.

[Copilot]

Minor grammar/punctuation: the sentence about Debug/Release defaults reads as a statement but is missing a trailing period and would read more cleanly as a complete sentence (e.g., add punctuation and consider adding 'the' before 'JIT compiler'/'interpreter').

Suggested change

	`Debug` and `Release` configurations now compile with both JIT compiler and interpreter disabled by default
	(the same behavior as `NativeOnlyDebug` and `NativeOnlyRelease`).
	The following properties are still available for explicit configuration:
	1. `DisableJIT` - Compile eBPF's *execution context* without support for eBPF JIT compiler.
	1. `DisableInterpreter` - Compile eBPF's *execution context* without support for eBPF interpreter.
	`Debug` and `Release` configurations now compile with both the JIT compiler and the interpreter disabled by default
	(the same behavior as the `NativeOnlyDebug` and `NativeOnlyRelease` configurations).
	The following properties are still available for explicit configuration:
	1. `DisableJIT` - Compile eBPF's *execution context* without support for the eBPF JIT compiler.
	1. `DisableInterpreter` - Compile eBPF's *execution context* without support for the eBPF interpreter.