qemu-tdx: Update to v8.1.0 + TDX patches

Let's update the QEMU to the one that's officially maintained by Intel
till all the TDX patches make their way upstream.

We've had to also update python to explicitly use python3 and add
python3-venv as part of the dependencies.

Fixes: #8810

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tools/packaging/static-build/qemu/Dockerfile

@@ -58,8 +58,8 @@ RUN apt-get update && apt-get upgrade -y && \
 	    libseccomp-dev${DPKG_ARCH} \
 	    libseccomp2${DPKG_ARCH} \
 	    patch \
-	    python \
-	    python-dev \
+	    python3 \
+	    python3-dev \
 	    python3-venv \
 	    rsync \
 	    zlib1g-dev${DPKG_ARCH} && \

versions.yaml

@@ -100,10 +100,9 @@ assets:
         .*/v?(\d\S+)\.tar\.gz
 
     qemu-tdx-experimental:
-      # yamllint disable-line rule:line-length
-      description: "QEMU with TDX support - based on https://github.com/intel/tdx-tools/releases/tag/2023ww15"
-      url: "https://github.com/kata-containers/qemu"
-      tag: "b67b00e6b4c7831a3f5bc684bc0df7a9bfd1bd56-plus-TDX-v1.10"
+      description: ¨QEMU with TDX support"
+      url: "https://github.com/intel/qemu-tdx"
+      tag: "tdx-qemu-next-2023.9.21-v8.1.0"
 
     qemu-snp-experimental:
       description: "QEMU with SNP support"