pak and remotes conflict when installing from git URL via remotes::install_deps()

[mkoohafkan]

Ran into this issue a few days ago---using pak conflicts with devtools::install() dependency resolution if you have previously used pak to install a dependency via a git URL. devtools tries to update packages listed in the DESCRIPTION "Remotes" tag via remotes::install_deps(), but fails because pak specified the RemoteType "git" and remotes does not recognize this type.

A related (the same?) issue was posted in #830, but I think this is a compatibility issue in remotes.

I recognize that we are in a transitional time of current best practices with pak, remotes, and devtools (#808), but I haven't seen info on the timeline for devtools is transitioning to pak (which would bypass this issue) so I am wondering if it is worth resolving this issue in remotes in the meantime. It seems like having remotes treat the RemoteType "git" identically to "xgit" would resolve the issue.