refactor(parser/html): refactor comments to be nodes in the tree

[dyc3]

Summary

This PR changes how comments are parsed such that they are included in the AST as actual nodes, and not just trivia attached to other nodes.

Fixes #4043 (but not the mismatched formatting)

Test Plan

Snapshots updated, CI should pass.

[github-actions]

Parser conformance results on

js/262

Test result	main count	This PR count	Difference
Total	48515	48515	0
Passed	47324	47324	0
Failed	1191	1191	0
Panics	0	0	0
Coverage	97.55%	97.55%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6570	6570	0
Passed	2203	2203	0
Failed	4367	4367	0
Panics	0	0	0
Coverage	33.53%	33.53%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	680	680	0
Passed	608	608	0
Failed	72	72	0
Panics	0	0	0
Coverage	89.41%	89.41%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	18433	18433	0
Passed	14114	14114	0
Failed	4319	4319	0
Panics	0	0	0
Coverage	76.57%	76.57%	0.00%

[codspeed-hq]

CodSpeed Performance Report

Merging #4056 will improve performances by 6.27%

_{Comparing 09-22-refactor_parser_html_refactor_comments_to_be_nodes_in_the_tree (c4b4266) with main (a3483e4)}

Summary

⚡ 1 improvements
✅ 106 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	09-22-refactor_parser_html_refactor_comments_to_be_nodes_in_the_tree	Change
⚡	eucjp_1600564308684076393.json[uncached]	1,023.8 µs	963.4 µs	+6.27%