from_bytes_le_support for Integer and Point

[CPerezz]

See: https://github.com/privacy-scaling-explorations/zkevm-circuits/blob/main/zkevm-circuits/src/tx_circuit/sign_verify.rs#L395-L398 left in the last refactor.

[CPerezz]

See https://github.com/privacy-scaling-explorations/zkevm-circuits/blob/ce8c0f00a22cbb8fb491f206fd757429d3c5e1ee/zkevm-circuits/src/tx_circuit/sign_verify.rs#L319 which is what we want to remove from zkevm-circuits and move to halo2wrong.

@kilic will take a look to that within the next weeks.