build: use ubuntu 22.04 LTS

Requires us to update to latest lnproto which is now using the most up
to date python-bitcoinlib, as well as updating our python lock files
(which pin the grpcio deps, because of locking problems h/t @cdecker)

Author: niftynei

.github/workflows/ci.yaml

@@ -99,7 +99,7 @@ jobs:
 
   proto-test:
     name: Protocol Test Config
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     timeout-minutes: 300
     needs: [smoke-test]
     strategy:

.gitmodules

@@ -16,7 +16,8 @@
 	url = https://github.com/valyala/gheap
 [submodule "external/lnprototest"]
 	path = external/lnprototest
-	url = https://github.com/rustyrussell/lnprototest.git
+	url = https://github.com/niftynei/lnprototest.git
+	branch = nifty/ripemd160-fallback
 [submodule "external/lowdown"]
 	path = external/lowdown
 	url = https://github.com/kristapsdz/lowdown.git

contrib/docker/Dockerfile.ubuntu

@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 LABEL mantainer="Vincenzo Palazzo [email protected]"
 
 WORKDIR /work