Updating connect timeout from 15 to 30 seconds

[Benjin]

Addresses #18521

[github-actions]

PR Changes

Category	Main Branch	PR Branch	Difference
Code Coverage	50.40%	50.53%	$${\color{lightgreen} .13\% }$$
VSIX Size	12160 KB	12160 KB	$${\color{lightgreen} 0 KB \space (0\%) }$$
Webview Bundle Size	3180 KB	3180 KB	$${\color{lightgreen} 0 KB \space (0\%) }$$

[kburtram]

thanks, 15 sec is too slow for lower end Azure SQL DB SKU. Instead of lower this value, let's look at that the "total connect timeout" with all the reliable connection retry stuff. Maybe we can reduce the number of connect retry attempts of something like that. But yeah, messing with this value is a bit of a balancing act.