build(windows): change bzip2 and xz-utils to not be shared

[DennisOSRM]

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Tasklist

• self-review code for correctness and following the coding guidelines
• add tests (see testing)
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[Copilot]

Pull request overview

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This PR updates Conan dependency options to build bzip2 and xz-utils as static (non-shared) libraries instead of shared ones.

Changes:

• Set bzip2 Conan option shared to False
• Set xz-utils Conan option shared to False

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[Copilot]

Switching bzip2 and xz-utils to static can change downstream link behavior (especially for consumers expecting shared libs) and may require explicitly linking any transitive system libs those recipes pull in (e.g., dl, pthread, platform-specific libs) depending on Conan profile/toolchain. Please validate that the final binaries still run on a clean runtime environment (no reliance on libbz2.so / liblzma.so) and that packaging/CI images don’t assume the shared libraries are present.