Fix GH-9921: Loading ext in FPM config does not register module handlers

[bukka]

The collection of module handlers happened before the loading of extension so the extension loaded in FPM config was not present there. To fix it, it is necessary to re-run collection of module handlers after extensions are loaded in FPM config.

[bukka]

This is based on GH-12277 as the crash needs to be fixed first. Once that gets merged I will rebase it.

[dstogov]

I requested some minor changes.

It looks like loading extensions through FPM was completely broken.
Is this the last known problem?
I expect we may have more...

[bukka]

@dstogov Requested changes done and all tests passed too.

It looks like loading extensions through FPM was completely broken.

Yeah it certainly must have not worked correctly for some extensions - especially those relaying on RINIT.

Is this the last known problem?

I'm not aware of other big issue except the ordering of extension in config which is more FPM config issue and there's also request to load zend extensions but that in the current architecture won't work properly (especially for opcache) as MINIT is in worker. Not sure about Xdebug but think Derick also mentioned some issues with that. So that's a lower priority really.

I expect we may have more...

I would expect some other issues surfacing up at some point but hopefully after this fix it should mostly work for most extensions.

[dstogov]

look good