Fix load stat for query result

[caohai]

For WebviewView, the load time should start with the resolveWebviewView call instead of with the controller initialization. The time from the latter approach can be artificially inflated as reactWebviewViewController instances are created during extension activation.
Before:

After:

[github-actions]

PR Changes

Category	Main Branch	PR Branch	Difference
Code Coverage	49.73%	49.89%	$${\color{lightgreen} .16\% }$$
VSIX Size	11713 KB	11704 KB	$${\color{lightgreen} -9 KB \space (0\%) }$$
Webview Bundle Size	3108 KB	3092 KB	$${\color{lightgreen} -16 KB \space (0\%) }$$