vendor: update buildkit to v0.19.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/go.opentelemetry.io/otel/verify_released_changelog.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+
+TARGET="${1:?Must provide target ref}"
+
+FILE="CHANGELOG.md"
+TEMP_DIR=$(mktemp -d)
+echo "Temp folder: $TEMP_DIR"
+
+# Only the latest commit of the feature branch is available
+# automatically. To diff with the base branch, we need to
+# fetch that too (and we only need its latest commit).
+git fetch origin "${TARGET}" --depth=1
+
+# Checkout the previous version on the base branch of the changelog to tmpfolder
+git --work-tree="$TEMP_DIR" checkout FETCH_HEAD $FILE
+
+PREVIOUS_FILE="$TEMP_DIR/$FILE"
+CURRENT_FILE="$FILE"
+PREVIOUS_LOCKED_FILE="$TEMP_DIR/previous_locked_section.md"
+CURRENT_LOCKED_FILE="$TEMP_DIR/current_locked_section.md"
+
+# Extract released sections from the previous version
+awk '/^<!-- Released section -->/ {flag=1} /^<!-- Released section ended -->/ {flag=0} flag' "$PREVIOUS_FILE" > "$PREVIOUS_LOCKED_FILE"
+
+# Extract released sections from the current version
+awk '/^<!-- Released section -->/ {flag=1} /^<!-- Released section ended -->/ {flag=0} flag' "$CURRENT_FILE" > "$CURRENT_LOCKED_FILE"
+
+# Compare the released sections
+if ! diff -q "$PREVIOUS_LOCKED_FILE" "$CURRENT_LOCKED_FILE"; then
+    echo "Error: The released sections of the changelog file have been modified."
+    diff "$PREVIOUS_LOCKED_FILE" "$CURRENT_LOCKED_FILE"
+    rm -rf "$TEMP_DIR"
+    false
+fi
+
+rm -rf "$TEMP_DIR"
+echo "The released sections remain unchanged."