coreclr/tools: resolve code-style analysis warnings and update `MicrosoftCodeAnalysisCSharpCodeStyleVersion` to sync with `MicrosoftCodeAnalysisVersion_LatestVS`

[layomia]

Per #91006 which upgrades build prop MicrosoftCodeAnalysisVersion_LatestVS version from 4.5.0 to 4.7.0:

Resolve code-style warnings that are currently suppressed by leaving this area's MicrosoftCodeAnalysisCSharpCodeStyleVersion at 4.5.0. The two properties should remain in sync, but the new version yields several warnings that require area-owner expertise to resolve.

Related: #91030.

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Issue Details

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Per #91006 which upgrades build prop MicrosoftCodeAnalysisVersion_LatestVS version from 4.5.0 to 4.7.0:

Resolve code-style warnings that are currently suppressed by leaving this area's MicrosoftCodeAnalysisCSharpCodeStyleVersion at 4.5.0. The two properties should remain in sync, but the new version yields several warnings that require area-owner expertise to resolve.

Author:	layomia
Assignees:	-
Labels:	area-Infrastructure, runtime-coreclr
Milestone:	8.0.0

[layomia]

cc @dotnet/dotnet-coreclr.