feat(ci): try fetching olean caches from older commits (#2278)
* feat(ci): try fetching older branch oleans
* docstring edits for set_theory.surreal
* debug
* debug 2
* formatting
* try fetching
* just increase depth
* improve script, improve surreal docstrings
* env context
* quieter curl
* fix overwriting
* git clean
* ci test: delete surreal.lean
* fix env var GIT_HISTORY_DEPTH
* add back surreal
* reviewer comments
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
