Circuit: Fix balance violation

[ConstanceBeguier]

To prevent balance violations, we have replaced the constraint "(v_old = 0 and split_flag = 0) or (root = anchor)"
with the constraint "(v_old = 0 and is_native_asset = 1) or (root = anchor)".
Previously, an adversary could use a zero-valued ZSA note to violate balance by setting v_old=0, v_new!=0, is_native_asset=0, split_flag=0.

Limit the version of dashmap (< 5.5) because recent dashmap versions required rust version 1.64 or newer
Limit the version of hashbrown (<0.13) because recent hashbrown versions required rust version 1.64 or newer