Bump NUnit from 3.14.0 to 4.6.0 - #3567

The call is ambiguous between the following methods or properties: 'NUnit.Framework.Assert.Throws<TExpected>(NUnit.Framework.TestDelegate)' and 'NUnit.Framework.Assert.Throws<TExpected>(System.Action)'

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

The call is ambiguous between the following methods or properties: 'NUnit.Framework.Assert.Throws<TExpected>(NUnit.Framework.TestDelegate)' and 'NUnit.Framework.Assert.Throws<TExpected>(System.Action)'

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Feature 'extensions' is not available in C# 12.0. Please use language version 14.0 or greater.

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/checkout@v4, actions/setup-dotnet@v4. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Possible null reference argument for parameter 'value' in 'CataloguesResult? JsonConvert.DeserializeObject<CataloguesResult>(string value)'.

Possible null reference return.

Possible null reference argument for parameter 'value' in 'BulkResourceReferences? JsonConvert.DeserializeObject<BulkResourceReferences>(string value)'.

Possible null reference return.

Possible null reference argument for parameter 'value' in 'ResourceReferenceWithResourceDetails? JsonConvert.DeserializeObject<ResourceReferenceWithResourceDetails>(string value)'.

Possible null reference return.

Possible null reference argument for parameter 'value' in 'ResourceSearchResult? JsonConvert.DeserializeObject<ResourceSearchResult>(string value)'.

Converting null literal or possible null value to non-nullable type.

Converting null literal or possible null value to non-nullable type.

'DetailFramework.Description' hides inherited member 'BrandedFramework.Description'. Use the new keyword if hiding was intended.