Update to .NET 10 RTM

[martincostello]

Update to stable version of .NET 10.

[Copilot]

Pull Request Overview

This PR updates the project from .NET 10 RC2 to the stable .NET 10 RTM release.

• Updates SDK and runtime versions from 10.0.100-rc.2.25502.107 to 10.0.100
• Updates ASP.NET Core package references from RC2 to stable 10.0.0 versions
• Modifies pre-release versioning configuration (with issues identified)

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
global.json	Updates .NET SDK and tools version from RC2 to RTM 10.0.100
eng/Versions.props	Changes pre-release versioning labels (incorrectly sets to "preview" instead of stable release configuration)
Directory.Packages.props	Updates Microsoft.AspNetCore package versions from RC2 to stable 10.0.0

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[Copilot]

The PR is updating to .NET 10 RTM (stable release), but these changes are setting the version label back to "preview" instead of removing the pre-release label entirely or setting appropriate values for a stable release. For a RTM release, PreReleaseVersionLabel should either be empty or removed, and PreReleaseBrandingLabel should not reference "Preview".

Suggested change

	<PreReleaseVersionLabel>preview</PreReleaseVersionLabel>
	<PreReleaseVersionIteration></PreReleaseVersionIteration>
	<PreReleaseBrandingLabel>Preview $(PreReleaseVersionIteration)</PreReleaseBrandingLabel>
	<PreReleaseVersionIteration></PreReleaseVersionIteration>

[Copilot]

For a stable RTM release, allowPrerelease should be set to false since the project is no longer using pre-release versions of the .NET SDK.

Suggested change

	"allowPrerelease": true,
	"allowPrerelease": false,