From: Alphadelta14 <alpha@alphaservcomputing.solutions>

This makes it possible to include submodule contents in an archive command.

This required updating the general read_tree callbacks to support sub-repos
by not using the_repository global references where possible.

archive: update streaming to use target repo
archive: add test cases for git archive --recurse-submodules

Signed-off-by: Heather Lapointe <alpha@alphaservcomputing.solutions>

Submitted-As: https://lore.kernel.org/git/pull.1359.git.git.1665597148042.gitgitgadget@gmail.com