Chore: Update common-packer to the latest v0.10.0

- Pull in the CentOS Stream 8 image var files

Signed-off-by: Anil Belur <abelur@linuxfoundation.org>
Change-Id: Ifbcbae678b324d42b5db19502eb9cd4e5286f0b4

diff --git a/packer/common-packer b/packer/common-packer
index 3dcae183d810816f31950afbe1fa08fa948e61fe..c314ebc6ef4d533e52657f589770698c0032ec26 160000 (submodule)
--- a/packer/common-packer
+++ b/packer/common-packer
@@ -1 +1 @@
-Subproject commit 3dcae183d810816f31950afbe1fa08fa948e61fe
+Subproject commit c314ebc6ef4d533e52657f589770698c0032ec26