cmake: Revert "cmake: use file(GLOB ..) to find .yaml.in files"

cmake: Revert "cmake: use file(GLOB ..) to find .yaml.in files"

This reverts commit 4e58b5899e98397ea928cbde1451b0734fa0892b.

the list of .yaml.in file might change over time before we finish the
.yaml.in file split, but cmake would fail to figure out the list without
rerunning "cmake", so when a new .yaml.in file is introduced, developer
might end up with a FTBFS after pulling the change from remote repo.

so, we need to revert the file(GLOB ..) change, until all .yaml.in file
are created.

Signed-off-by: Kefu Chai <kchai@redhat.com>