ci: run Forgejo Actions & Packages test w/ dynamic matrix (#1367)

Incorporates these changes:
- When `forgejo/build-from-sources` is present, Actions & Packages tests are run only against the built versions.  Otherwise, they are run against the versions defined in `$RELEASE_NUMBERS`
- Updates Packages tests which are testing Alpine publishing to use currently supported Alpine releases
- Actions & Packages tests are run in a matrix, allowing parallel execution

Only the Actions & Packages tests take a significant amount of time (>10 minutes), so changes have been limited to those test suites -- every test suite that is moved into a matrix adds additional overhead in the 1 minute `prepare-end-to-end` step.

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/1367
Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Co-committed-by: Mathieu Fenniak <mathieu@fenniak.net>

packages/alpine/package-source/forgejo-2173/APKBUILD

@@ -0,0 +1,24 @@
+# -*- mode: Shell-script; eval: (setq indent-tabs-mode 't); eval: (setq tab-width 4) -*-
+# Maintainer: Dominic Meiser <git@msrd0.de>
+pkgname=forgejo-2173
+pkgver=1.0
+pkgrel=0
+pkgdesc="Forgejo #2173 Reproduction"
+url="https://msrd0.dev/msrd0/$pkgname"
+arch="noarch"
+license="custom"
+
+subpackages="$pkgname-openrc"
+
+source="forgejo_2173 forgejo_2173.init"
+builddir="$srcdir"
+
+package() {
+	install -D -m755 "$srcdir/forgejo_2173" "$pkgdir"/usr/bin/forgejo_2173
+	install -D -m755 "$srcdir/forgejo_2173.init" "$pkgdir"/etc/init.d/forgejo_2173
+}
+
+sha512sums="
+651c2a816510a18981bcd45077eb5acd6e58511d641949ddc690e326b81018d851eb7f1c88e2336eada2f216606ce2aa0569eb2d02d7c423c80705cc00acf838  forgejo_2173
+abc3b1c91bd69478e8e0d46a31148bcd5b4e7838dc35e7b601673866d7e925d70ab70d63c32df98aad060134eaaa6f957691c2c4397d85af5a77f9773de21b5b  forgejo_2173.init
+"

packages/alpine/package-source/forgejo-2173/forgejo_2173

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "Hello World"

packages/alpine/package-source/forgejo-2173/forgejo_2173.init

@@ -0,0 +1,7 @@
+#!/sbin/openrc-run
+
+command="/usr/bin/forgejo_2173"
+
+depend() {
+	need net
+}

packages/alpine/package-source/forgejo-2174/APKBUILD

@@ -0,0 +1,26 @@
+# -*- mode: Shell-script; eval: (setq indent-tabs-mode 't); eval: (setq tab-width 4) -*-
+# Maintainer: Dominic Meiser <git@msrd0.de>
+pkgname=forgejo-2174
+pkgver=1.0
+pkgrel=0
+pkgdesc="Forgejo #2174 Reproduction"
+url="https://msrd0.dev/msrd0/$pkgname"
+arch="x86_64"
+license="custom"
+
+# using x86_64 instead of noarch as a workaround of
+# https://codeberg.org/forgejo/forgejo/issues/2173
+subpackages="$pkgname-openrc::x86_64"
+
+source="forgejo_2174 forgejo_2174.init"
+builddir="$srcdir"
+
+package() {
+	install -D -m755 "$srcdir/forgejo_2174" "$pkgdir"/usr/bin/forgejo_2174
+	install -D -m755 "$srcdir/forgejo_2174.init" "$pkgdir"/etc/init.d/forgejo_2174
+}
+
+sha512sums="
+651c2a816510a18981bcd45077eb5acd6e58511d641949ddc690e326b81018d851eb7f1c88e2336eada2f216606ce2aa0569eb2d02d7c423c80705cc00acf838  forgejo_2174
+b1cba77139cdaf9e0cdd78de93becbb3891ec59646e8d2cb40620b230bd798d51e6d9c58e65b584812a6bb8eb2b9c9f89262a8700a39c62af8ec8ea09aee4e29  forgejo_2174.init
+"

packages/alpine/package-source/forgejo-2174/forgejo_2174

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "Hello World"

packages/alpine/package-source/forgejo-2174/forgejo_2174.init

@@ -0,0 +1,7 @@
+#!/sbin/openrc-run
+
+command="/usr/bin/forgejo_2174"
+
+depend() {
+	need net
+}