cli: add -stdinwalletpassphrase for (slightly more) secure CLI

Summary:

This PR

• adds -stdinwalletpassphrase for use with walletpasshprase(change)
• adds no-echo for passwords (-stdinrpcpass and above)

This is a backport of Core PR13716 [2/3]
Commit: https://github.com/bitcoin/bitcoin/pull/13716/commits/7f11fba2e3c7b1e00ffb98504cdcfc2ded9c09cf
Depends D8106

Test Plan:

src/bitcoin-cli -help
src/bitcoin-cli -stdinrpcpass getnetworkinfo
src/bitcoin-cli -stdinrpcpass -stdinwalletpassphrase walletpassphrase

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, deadalnix

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, deadalnix

Subscribers: deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D8107