Branding updates for 9.9

[Copilot]

This PR updates the repository branding from version 9.8 to 9.9, following the same pattern established in PR #6573 for the 9.8 branding update.

Changes Made

Version Configuration:

• Updated MinorVersion from 8 to 9 in eng/Versions.props

Compatibility Suppressions:

• Kept CompatibilitySuppressions.xml file for Microsoft.Extensions.Diagnostics.ResourceMonitoring library. While the intent was to remove compatibility suppressions for the UseDeltaNrPeriodsForCpuCalculation and CalculateCpuUsageWithoutHostDelta properties, the file must remain until the 9.8 release is completed and baseline version validation is updated.

Template Updates:

• Updated all test template snapshots to reference version 9.9.0 instead of 9.8.0 for:
  • Microsoft.Extensions.AI packages
  • Microsoft.Extensions.AI.OpenAI packages
  • Microsoft.Extensions.Http.Resilience packages

The changes affect 10 files with 13 additions and 1 deletion, maintaining the same surgical approach used in previous branding updates. Since the main branch has been branched for the 9.8 release, it now represents the 9.9 development branch and requires these branding updates.

Fixes #6692.

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[Copilot]

Pull Request Overview

This PR updates repository branding from version 9.8 to 9.9 to prepare the main branch for the next development cycle after the 9.8 release has been branched.

• Updates the minor version from 8 to 9 in the version configuration
• Updates all test template snapshots to reference version 9.9.0 instead of 9.8.0
• Maintains compatibility suppressions file as required until 9.8 baseline validation is updated

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
eng/Versions.props	Updates MinorVersion from 8 to 9 for the 9.9 development cycle
test/ProjectTemplates/.../aichatweb.OpenAI_AzureAISearch.verified/aichatweb/aichatweb.csproj	Updates Microsoft.Extensions.AI package references to 9.9.0
test/ProjectTemplates/.../aichatweb.Ollama_Qdrant.verified/aichatweb/aichatweb.Web/aichatweb.Web.csproj	Updates Microsoft.Extensions.AI package reference to 9.9.0
test/ProjectTemplates/.../aichatweb.Ollama_Qdrant.verified/aichatweb/aichatweb.ServiceDefaults/aichatweb.ServiceDefaults.csproj	Updates Microsoft.Extensions.Http.Resilience package reference to 9.9.0
test/ProjectTemplates/.../aichatweb.BasicAspire.verified/aichatweb/aichatweb.Web/aichatweb.Web.csproj	Updates Microsoft.Extensions.AI package references to 9.9.0
test/ProjectTemplates/.../aichatweb.BasicAspire.verified/aichatweb/aichatweb.ServiceDefaults/aichatweb.ServiceDefaults.csproj	Updates Microsoft.Extensions.Http.Resilience package reference to 9.9.0
test/ProjectTemplates/.../aichatweb.Basic.verified/aichatweb/aichatweb.csproj	Updates Microsoft.Extensions.AI package references to 9.9.0
test/ProjectTemplates/.../aichatweb.AzureOpenAI_Qdrant_Aspire.verified/aichatweb/aichatweb.Web/aichatweb.Web.csproj	Updates Microsoft.Extensions.AI package references to 9.9.0
test/ProjectTemplates/.../aichatweb.AzureOpenAI_Qdrant_Aspire.verified/aichatweb/aichatweb.ServiceDefaults/aichatweb.ServiceDefaults.csproj	Updates Microsoft.Extensions.Http.Resilience package reference to 9.9.0

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