Avoid duplicate [Obsolete] attribute in Resources

[kzu]

Since we extend the partial class for many resources by group, we may end up adding the attribute multiple times

[devlooped-bot]

🧪 Details on Microsoft Windows 10.0.20348

✅ ThisAssemblyTests.ScribanTests.CanRenderModel
✅ ThisAssemblyTests.Tests.CanReadResourceFile
✅ ThisAssemblyTests.Tests.CanUseByteResource
✅ ThisAssemblyTests.Tests.CanUseConstants
✅ ThisAssemblyTests.Tests.CanUseFileConstantInvalidIdentifier
✅ ThisAssemblyTests.Tests.CanUseFileConstantLinkedFile
✅ ThisAssemblyTests.Tests.CanUseFileConstants
✅ ThisAssemblyTests.Tests.CanUseFileInvalidCharacters
✅ ThisAssemblyTests.Tests.CanUseGitBranchConstants
✅ ThisAssemblyTests.Tests.CanUseGitConstants
✅ ThisAssemblyTests.Tests.CanUseHierarchicalMetadata
✅ ThisAssemblyTests.Tests.CanUseInfo
✅ ThisAssemblyTests.Tests.CanUseInfoDescription
✅ ThisAssemblyTests.Tests.CanUseMetadata
✅ ThisAssemblyTests.Tests.CanUseMultilineProjectProperty
✅ ThisAssemblyTests.Tests.CanUseProjectProperty
✅ ThisAssemblyTests.Tests.CanUseSameNameDifferentExtensions
✅ ThisAssemblyTests.Tests.CanUseSemicolonsInConstant
✅ ThisAssemblyTests.Tests.CanUseStringResource
✅ ThisAssemblyTests.Tests.CanUseStringsIndexedArguments
✅ ThisAssemblyTests.Tests.CanUseStringsIndexedFormattedArguments
✅ ThisAssemblyTests.Tests.CanUseStringsNamedArguments
✅ ThisAssemblyTests.Tests.CanUseStringsNamedFormattedArguments
✅ ThisAssemblyTests.Tests.CanUseTextResource
✅ ThisAssemblyTests.Tests.CanUseTypedBoolConstant
✅ ThisAssemblyTests.Tests.CanUseTypedDoubleConstant
✅ ThisAssemblyTests.Tests.CanUseTypedInt64Constant
✅ ThisAssemblyTests.Tests.CanUseTypedIntConstant
✅ ThisAssemblyTests.Tests.CanUseTypedLongConstant
✅ ThisAssemblyTests.Tests.CanUseTypedTimeSpanStaticProp

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