cpp: Do not add resource file in static builds

[stefanct]

Description

The resource file FastCdr.rc seems to be unnecessary in static builds and break cross-compilation with mingw unnecessarily.
This patch uses CMake's generator expressions to only include them when building shared libraries.
I have build tested it with -DBUILD_SHARED_LIBS=0 and =1 with a native Linux gcc 12.2.0 on Debian and a mingw-gcc (built with (MXE)[https://github.com/mxe/mxe]), respectively.

Fixes #166

Contributor Checklist

• [❌] Commit messages follow the project guidelines.
• [❌] The code follows the style guidelines of this project.
• [❌] Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
• [❌] Any new/modified methods have been properly documented using Doxygen.
• [❌] Changes are backport compatible: they do NOT break ABI nor change library core behavior.
• [❌] Changes are API compatible.
• [❌] New feature has been added to the versions.md file (if applicable).
• [❌] Applicable backports have been included in the description.

Aint nobody got time for admin shenanigans. I don't deem the single line copyrighted/copyrightable.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• Check CI results: changes do not issue any warning.
• Check CI results: CI pass and failing tests are unrelated with the changes.