Update .NET 9.0 with PowerShell v7.5.8

[jshigetomi]

This pull request updates the bundled PowerShell version in all .NET 9.0 SDK Dockerfiles and related manifests from 7.5.7 to 7.5.8. The update includes new download URLs and SHA512 checksums for the PowerShell package across all supported architectures and operating systems.

Key changes:

PowerShell Version Update:

• Updated the PowerShell version from 7.5.7 to 7.5.8 in all relevant Dockerfiles for both Linux and Windows images, ensuring that new builds will use the latest patch release. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Manifest and Checksum Updates:

• Updated manifest.versions.json to reflect the new PowerShell 7.5.8 version and associated SHA512 checksums for all platforms. This ensures integrity verification and accurate image builds.

These changes keep the SDK images up to date with the latest PowerShell release and maintain security by updating checksums for package verification.