ParsoidHandler: use HtmlOutputRendererHelper in wt2html
NOTE: This causes Parsoid output to be written to the parser cache.
This should be unconditional in the future, but for now it is
controled by wgTemporaryParsoidHandlerParserCacheWriteRatio.
This change affects the following endpoints that use the wt2html method:
- /coredev/v0/transform/wikitext/to/html in core
- /{domain}/v3/transform/wikitext/to/html from parsoid
- /{domain}/v3/page/html/{title} from parsoid
The /v1/page/{title}/html endpoint is not affected, since it
doesn't use wt2html, but has always been using HtmlOutputRendererHelper
directly.
Bug: T322672
Depends-On: Ic37f606bb51504c8164d005af55ca9a65f595041
Change-Id: Ie430acd0753880d88370bb9f22bb40a0f9ded917