test: use bundle2 for exchange in test-push-warn Using bundle2 for exchange unlocks the usage of changegroup version 2. This version of the changegroup held more information (delta base) that result in a small increase in content size (20 bytes).

test: use bundle2 for exchange in test-largefile Using bundle2 for exchange unlock the usage of changegroup version 2. This version of the changegroup held more information (delta base) that result in a small increase in content size. It also lead to reordering of output because the exchange scheduling is a bit different.

test: use bundle2 for exchange in test-push-warn Using bundle2 for exchange unlocks the usage of changegroup version 2. This version of the changegroup held more information (delta base) that result in a small increase in content size (20 bytes x 2 changes).