Remove spendingPassword from /api/v1/transactions/fees

[piotr-iohk]

Context

The API doc dor POST /api/v1/transactions/fees reads -> this endpoint does not require a spending password to be supplied..., however it is listed there as an optional parameter. (cf https://input-output-hk.github.io/cardano-wallet/#tag/Transactions%2Fpaths%2F~1api~1v1~1transactions~1fees%2Fpost. )

Currently this parameter is not required at all for estimating fee so it can be removed from this endpoint (including API doc)

Decision

Remove spendingPassword from the POST /api/v1/transactions/fees and update API doc accordingly.

Acceptance Criterias

1. The API must have spendingPassword removed from POST /api/v1/transactions/fees
2. Api doc must be updated accordingly
3. Client.getTransactionFee needs to be updated as well not to use the spendingPassword (?)

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Development Plan

PR

Number	Base
#?	develop

QA

Criteria	Coverage
?	-

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Retrospective