build: Fix snap build (1.26) (#37686)

---------

Signed-off-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

snap/part-gitea-build.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e
+
+if [ ! -f go.mod -o ! -d snap ]; then
+  echo "This script should be run from the root of the gitea repository"
+  exit 1
+fi
+
+if [ -z "$SNAPCRAFT_PART_INSTALL" ]; then
+  SNAPCRAFT_PART_INSTALL="./dist/snap"
+  echo "* using mock install path: $SNAPCRAFT_PART_INSTALL"
+fi
+
+command -v pnpm >/dev/null 2>&1 || npm install -g pnpm
+
+TAGS="bindata sqlite sqlite_unlock_notify pam cert" make build
+
+install -D gitea "${SNAPCRAFT_PART_INSTALL}/gitea"
+cp -r options "${SNAPCRAFT_PART_INSTALL}/"