ci: tag sanity, rustfmt and clang-format job as a "placeholder" job
What does this MR do and why?
ci: tag sanity job as a "placeholder" job
There is close to zero work needed to execute this job.
Should speed up the initial process of entering into pipeline tree
and also provide an opportunity for `aarch64` runners to engage sooner,
even when x86_64 machines are loaded.
/cc @daniels
Edited by David Heidelberg