sapphire-dev: deposit test mnemonic, core-22.2.11, optionally use single compute note

[CedarMist]

This makes 4 changes:

• Increase number of tokens to 100,000 in oasis-deposit
• Add -test-mnemonic flag to oasis-deposit which uses the test test test ... junk mnemonic
  • This addresses a problem I was having with CI in sapphire-paratime, couldn't get the -to flag working with a mnemonic via GitHub workflow (no combination of quoting or escaping would let me pass a quoted parameter with spaces in it!)
• Upgrade to Oasis Core 22.2.11
• Use a single compute node by default when running sapphire-dev (reduces CPU usage)

Additionally there was some weirdness with PostgreSQL I had when building the sapphire-dev container that I didn't have early last week and was unable to find the root cause. After installing the postgresql package some of the permissions were wrong which prevented it from starting. Running chown wouldn't persist across RUN statements, meaning I had to prefix the /etc/init.d/postgresql start command with chown, and then run it again in start.sh upon startup. I'm using Docker 20.10.25-0ubuntu1~22.04.1.

Re #411: using 1 compute node instead of 2 doesn't significantly affect startup time, but it does help battery life. Am still (slowly) investigating idle CPU usage and startup time (wait-node)

The startup process now looks like:

docker run --rm -it -p8545:8545 -p8546:8546 ghcr.io/oasisprotocol/sapphire-dev:local -test-mnemonic
sapphire-dev local (oasis-core: 22.2.11, sapphire-paratime: 0.5.2, oasis-web3-gateway: 3.3.0-git0d09728+dirty)

 * Starting oasis-net-runner with sapphire
 * Starting PostgreSQL 14 database server                                                                             [ OK ] 
 * Starting oasis-web3-gateway
 * Bootstrapping network (this might take a minute)...
 * Populating accounts

Available Accounts
==================
(0) 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266 (100000 TEST)
(1) 0x70997970C51812dc3A010C7d01b50e0d17dc79C8 (100000 TEST)
(2) 0x3C44CdDdB6a900fa2b585dd299e03d12FA4293BC (100000 TEST)
(3) 0x90F79bf6EB2c4f870365E785982E1f101E93b906 (100000 TEST)
(4) 0x15d34AAf54267DB7D7c367839AAf71A00a2C6A65 (100000 TEST)

Private Keys
==================
(0) 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80
(1) 0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d
(2) 0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a
(3) 0x7c852118294e51e653712a81e05800f419141751be58f605c371e15141b007a6
(4) 0x47e179ec197488593b187f80a00eb0da91f1b9d0b13f8733639f19c30a34926a

HD Wallet
==================
Mnemonic:	test test test test test test test test test test test junk
Base HD Path:	m/44'/60'/0'/0/%d

WARNING: The chain is running in ephemeral mode. State will be lost after restart!

Listening on http://localhost:8545 and ws://localhost:8546

[codecov]

Codecov Report

Merging #413 (60cdea7) into main (8e2d308) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #413   +/-   ##
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  Coverage   60.02%   60.02%           
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  Files          37       37           
  Lines        4040     4040           
=======================================
  Hits         2425     2425           
  Misses       1406     1406           
  Partials      209      209