git: update to v2.53.0

Update to git version v2.53.0, this requires changes for these
upstream commits:

* bdbebe5714b25dc9d215b48efbb80f410925d7dd
  refs: introduce wrapper struct for `each_ref_fn`

* 589127caa73090040200989ff4d24c3d54f473f2
  packfile: move list of packs into the packfile store

* 5a5c7359f77ecd1bc4b0e172563161d602f131d3
  refs: drop `current_ref_iter` hack

* b6e4cc8c32850315323961659e553d1d14591f7f
  tag: support arbitrary repositories in parse_tag()

* 84f0e60b28de69d1ccb7a51b729af6202b6cf4c8
  packfile: move packfile store into object source

Signed-off-by: Christian Hesse <mail@eworm.de>
9 files changed