recipes: Start WORKDIR -> UNPACKDIR transition

Replace references of WORKDIR with UNPACKDIR where it makes sense to do
so in preparation for changing the default value of UNPACKDIR.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-cmake_3.28.3.bb

@@ -22,7 +22,7 @@ addtask do_patchbuild after do_patch before do_configure
 
 do_patchbuild () {
 	rm -f ${S}/CMakeLists.txt
-	cp ${WORKDIR}/CMakeLists.txt ${S}/
+	cp ${UNPACKDIR}/CMakeLists.txt ${S}/
 }
 
 do_install:append () {