dotnet-native: wrapper script to fix NuGet HOME for all consumers

Instead of patching every recipe that invokes dotnet (whack-a-mole),
replace the dotnet symlink in native builds with a wrapper script
that ensures HOME is always writable before exec-ing the real binary.

.NET SDK 6 NuGet MigrationRunner.Run() fires unconditionally before
DOTNET_SKIP_FIRST_TIME_EXPERIENCE is checked, and hardcodes
$HOME/.local/share/NuGet/Migrations.  The wrapper redirects HOME
to a writable temp directory, fixing python3-pythonnet, python3-clr-loader,
dotnet-helloworld, and any future dotnet consumer automatically.

Also add python3-pythonnet to the CI cleansstate list.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Alex J Lennon

.github/workflows/CI_github.yml

@@ -101,7 +101,7 @@ jobs:
     - name: Clean stale sstate
       run: |
         . ./${BRANCH}/poky/oe-init-build-env ${BRANCH}/build
-        bitbake -c cleansstate dotnet dotnet-native python3-clr-loader python3-clr-loader-native dotnet-helloworld
+        bitbake -c cleansstate dotnet dotnet-native python3-clr-loader python3-clr-loader-native dotnet-helloworld python3-pythonnet
     - name: Building Mono Test Image
       run: |
         . ./${BRANCH}/poky/oe-init-build-env ${BRANCH}/build

recipes-mono/dotnet/dotnet.inc

@@ -100,4 +100,25 @@ RRECOMMENDS:dotnet-dev[nodeprrecs] = "1"
 INSANE_SKIP:${PN} = "already-stripped libdir staticdev textrel dev-so"
 INSANE_SKIP:${PN}-dbg = "libdir"
 
+# For native builds, replace the dotnet symlink with a wrapper script that
+# ensures HOME is always writable.  .NET SDK 6 NuGet MigrationRunner.Run()
+# unconditionally writes to $HOME/.local/share/NuGet/Migrations *before*
+# checking DOTNET_SKIP_FIRST_TIME_EXPERIENCE.  In CI containers HOME is
+# often read-only, breaking every recipe that invokes dotnet.  The wrapper
+# fixes this for ALL consumer recipes automatically.
+do_install:append:class-native() {
+    rm -f ${D}${bindir}/dotnet
+    cat > ${D}${bindir}/dotnet << 'WRAPPER'
+#!/bin/sh
+export HOME="${DOTNET_CLI_HOME:-${TMPDIR:-/tmp}/dotnet-home}"
+mkdir -p "$HOME" 2>/dev/null || true
+export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
+export DOTNET_CLI_TELEMETRY_OPTOUT=1
+export DOTNET_NOLOGO=1
+SELF_DIR="$(cd "$(dirname "$0")" && pwd)"
+exec "${SELF_DIR}/../share/dotnet/dotnet" "$@"
+WRAPPER
+    chmod 0755 ${D}${bindir}/dotnet
+}
+
 BBCLASSEXTEND = "native nativesdk"