upload-pack: pass upload_pack_data to got_oid()

upload-pack: pass upload_pack_data to got_oid()

As we cleanup 'upload-pack.c' by using 'struct upload_pack_data'
more thoroughly, let's pass that struct to got_oid(), so that
this function can use all the fields of the struct.

This will be used in followup commits to move a static variable
into 'upload_pack_data'.

Signed-off-by: Christian Couder <redacted>
Signed-off-by: Junio C Hamano <redacted>