Create Validator Accounts V2 Send Deposit

[rauljordan]

What type of PR is this?

Feature

What does this PR do? Why is it needed?

This PR adds the ability to submit validator deposits via the accounts-v2 CLI for a Prysm HD wallet.

Usage

The user can submit the deposits interactively by following a nice prompt with a series of steps where they pick the accounts they want, confirm the amount of ETH being sent, and track the progress of the deposits. Alternatively, one can do the process non-interactively via CLI flags:

bazel run //validator -- accounts-v2 deposit \
    --wallet-dir=/Users/me/Library/Eth2Validators/prysm-wallet-v2 \
    --deposit-contract=0x8A3b401d1d3F33DDfDB03A3538A3EC9247ca089d \
    --eth1-private-key-file=/tmp/privkey.txt \
    --skip-deposit-confirmation \
    --http-web3provider=https://goerli.prylabs.network \
    --wallet-password-file=/tmp/walletpass.txt \
    --deposit-all-accounts

Will non-interactively send out deposits to the deposit contract! Deployed a dummy contract to goerli, so the command above should work for you.

[terencechain]

Code looks good me. I didnt test it though

[codecov]

Codecov Report

Merging #7080 into master will increase coverage by 1.94%.
The diff coverage is 73.88%.

@@            Coverage Diff             @@
##           master    #7080      +/-   ##
==========================================
+ Coverage   60.07%   62.02%   +1.94%     
==========================================
  Files         323      408      +85     
  Lines       27422    31917    +4495     
==========================================
+ Hits        16473    19795    +3322     
- Misses       8733     9326     +593     
- Partials     2216     2796     +580