This MR moves Tor Browser to the first Firefox 102 branch, updates all the needed toolchains, and tries to remove the dependency on GCC on Windows whenever possible.
Fixes: #29318, #29321 (closed), #29322 (closed), #40409 (closed), #40591 (closed), #40592 (closed), #40595 (closed), tor-browser#41152 (closed).
Currently drafted because blocked on !501 (merged) (it includes also its commit, but in case of change I'll rebase it to main).