CHIA-1645: Some daemon start cleanup

[emlowe]

Change the daemon startup procedure:

• During start, the daemon no longer outputs some JSON on stdout. This was previously read by the GUI (although it's not known how long it was used) - but hasn't been read since earlier this year (see Remove unused code that attempts to read the output of the daemon chia-blockchain-gui#2526) when the GUI startup was changed to use chia start daemon
• The daemon is launched with setting stdout,stderr,stdin to DEVNULL and with start_new_session
• Code was added to stop trying to read the daemon stdout as a mechanism to wait for the daemon to be ready and code added to retry to connect to the socket

This seems to work well so far in my testing and I believe this will fix both #18677 and #16396

I tested launching the daemon in a variety of ways including

• chia start daemon
• chia run_daemon
• chia_daemon

So far testing was limited to macOS and Linux, Windows needs some additional testing.

[github-actions]

File	Coverage	Missing Lines
chia/cmds/start_funcs.py	0.0%	lines 53-54
chia/daemon/client.py	86.7%	lines 57-58

Total	Missing	Coverage
18 lines	4 lines	77%