Define project metadata for sip

[peterfpeterson]

This add metadata so sip will stop creating the error message

14:25:35 sip-build: pyproject.toml: the '[tool.sip.metadata]' section is missing
14:25:35 CMake Warning at buildconfig/CMake/FindSIP.cmake:110 (message):
14:25:35   FindSIP failed to determine sip version
14:25:35 Call Stack (most recent call first):
14:25:35   CMakeLists.txt:136 (find_package)

There is no associate issue

To test:

Look at the build logs and see that the version of sip is logged from cmake rather than the error that is listed above.

This does not require release notes because it only gets rid of a warning in the builds.

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