treewide: bump to bazel 8

Change-Id: I18b6b4a5893167d722bb6270f11da1814c1664e3
Reviewed-on: https://review.monogon.dev/c/monogon/+/3963
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/third_party/bazelrc/aspect/bazel8.bazelrc b/third_party/bazelrc/aspect/bazel8.bazelrc
new file mode 100644
index 0000000..e01f897
--- /dev/null
+++ b/third_party/bazelrc/aspect/bazel8.bazelrc
@@ -0,0 +1 @@
+# No Bazel 8 specific flag presets yet.