* Use bazel 7 and bzlmod
Many of our dependencies are now using bazel 7 and the new bzlmod module
system. This has been breaking our autoroll; this PR should fix the
issues we've been having with that.
It may or may not be worthwhile to update effcee to use bzlmod as well;
this would let us get rid of WORKSPACE entirely.
* Try to force cla check to rerun
