lint updated recipes as well, and move script (#7926)

* also lint changed recipes

example commit taken from a recent PR:

$ git diff  HEAD HEAD~ --numstat
7   7   media-sound/freac/{freac-1.1.7.recipe => freac-1.1.6.recipe}

-> lint-new-recipes.sh tries to find `media-sound/freac/{freac-1.1.7.recipe` which does not exist

$ git diff --no-renames HEAD HEAD~ --numstat
98  0   media-sound/freac/freac-1.1.6.recipe
0   98  media-sound/freac/freac-1.1.7.recipe

-> lint-new-recipes.sh skips over 1.1.6 (because it is gone) and lints 1.1.7

* move lint-new-recipes.sh into .github/

.github/lint-new-recipes.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+# Lints all the recipes created / modified since upstream HEAD.
+git remote add real_origin https://github.com/haikuports/haikuports.git || true
+git fetch real_origin
+
+files=$(git diff --no-renames $(git rev-parse --abbrev-ref HEAD) real_origin/master --numstat | awk '{print $3}')
+for file in $files; do
+	if [ -e "$file" ] && [[ "$file" == *recipe ]]; then
+		LINES=$(grep -l '[[:blank:]]$' $file)
+		if [ ! -z "$LINES" ]; then
+			echo "Trailing whitespace in '$file'."; exit 1
+		fi
+
+		baseName=$(basename $file)
+		portName=${baseName::-7}
+		haikuporter $@ --lint $portName
+		if [ $? -ne 0 ]; then exit 1; fi
+	fi
+done

.github/workflows/lint.yml

@@ -29,4 +29,4 @@ jobs:
       - name: 'Lint new recipes'
         run: |
           export "PATH=$PATH:../haikuporter"
-          ./lint-new-recipes.sh --config=haikuports.conf --licenses=haiku-licenses-master
+          ./.github/lint-new-recipes.sh --config=haikuports.conf --licenses=haiku-licenses-master