Fees are incorrect on Move_stake/transfer_stake extrinsics when switching subnets

[dougsillars]

Describe the bug

Use case is moving/transfering stake from Subnet X to Subnet y (x != y) and neither are root

move_stake.rs calls
transition_stake_internal

line 350 calculates the fee. calculate_staking_fee in stake_utils
since the netuids are different, and origin is not root - we end up on the else
stake_utils.rs line 1168, and the fee is 1 epoch worth of alpha for the amount being unstaked.

back to move_stake.rs

line 341
fee is defined as one epoch of alpha

350 - unstake charging the fee

#here is the mistake:
367 stake into the new subnet - charging the same fee.

You can see this in the following extrinsic:
https://taostats.io/extrinsic/5752552-0006

Stake removed event #5752552-0018. (fee of 1482474)
https://taostats.io/event/5752552-0018?network=finney

stake added event:#5752552-0019 (fee of 1482474)
https://taostats.io/event/5752552-0019?network=finney

The stake added fee should be the default fee of tao-> subnet of 50,000 rao.

To Reproduce

As explained above:

https://taostats.io/extrinsic/5752552-0006

Expected behavior

I expected https://taostats.io/event/5752552-0019

to have a fee of 50,000 rao

Screenshots

No response

Environment

production

Additional context

No response

[dougsillars]

line 348 - half of the tao is put in SN A

the other half of the tao is put in Subnet B

I think all the tao should be in A

and a new fee should be charged (50k ) into B.

the current code is not fair to SN A