Revert "Move NewPP limit report HTML comments to JS variables" and followups

Revert "Move NewPP limit report HTML comments to JS variables" and followups

This change resulted in unreasonable feature loss (human-readable
limit report was gone). Three months and multiple followups later,
the functionality is still not completely restored. Given lack
of response from the original author, I think it is time to revert
and reconsider, especially since the 1.28 release is soon.

A machine-readable limit report would be a very useful feature,
but not at the cost of losing human-readable limit report.

This reverts the following commits:

* Move NewPP limit report HTML comments to JS variables
  b7c4c8717f964d1890d185ec3e6e9481fcb734e4
* Only pretty-print the parser report JS vars
  28adc4d7eef2d7d8e5696a4f9849538a769daa00
* Show wgPageParseReport on page previews too
  1255654ed5a89ed57491bda38f544ed87e3bc601
* Re-add human readable parser limit report
  0051f108b954b52b9981d5d85862ac1f292db80c
* Restore hooks.txt for ParserLimitReportFormat
  4663e7a7371fabb96ed9c909e5b93042c5f08438

Resolved minor merge conflicts in OutputPage (with 80e5b160)
and release notes.

Bug: T110763
Bug: T142210
Change-Id: Id88c8066fae3f369e8977b4b7488f67071bdeeb7