update dockerfiles based on latest streamline image

The latest images incorporate all changes previously added by the dockerfiles.
The arm image however is still missing/unreliable from the registry and must be
built independently.

docker/streamline-src/vendor/sebastian/code-unit/src/CodeUnitCollectionIterator.php

@@ -0,0 +1,54 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of sebastian/code-unit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace SebastianBergmann\CodeUnit;
+
+use Iterator;
+
+/**
+ * @template-implements Iterator<int, CodeUnit>
+ */
+final class CodeUnitCollectionIterator implements Iterator
+{
+    /**
+     * @psalm-var list<CodeUnit>
+     */
+    private array $codeUnits;
+    private int $position = 0;
+
+    public function __construct(CodeUnitCollection $collection)
+    {
+        $this->codeUnits = $collection->asArray();
+    }
+
+    public function rewind(): void
+    {
+        $this->position = 0;
+    }
+
+    public function valid(): bool
+    {
+        return isset($this->codeUnits[$this->position]);
+    }
+
+    public function key(): int
+    {
+        return $this->position;
+    }
+
+    public function current(): CodeUnit
+    {
+        return $this->codeUnits[$this->position];
+    }
+
+    public function next(): void
+    {
+        $this->position++;
+    }
+}