[MC-239420] Block marker particle shows inaccurate textures in some cases

A resource pack to fix known cases of this issue can be found attached to this ticket.

The bug

The newly added block_marker particle references the assigned particle texture for the block. This is prone to causing inaccurate results.

Closely relates to ~~MC-239407~~, which counts cases where no particle is defined at all.

Also a close relative to MC-1874, which concerns the breaking particles of the blocks in question. Most cases can be fixed in the same way (although blocks like brewing stands differ between these cases: as block particles they pose problems, but for block_marker they're fine).

List of cases

Block	Texture used	Expected texture
minecraft:chest	Oak Planks	Chest top
minecraft:trapped_chest	Oak Planks	Chest top
minecraft:ender_chest	Obsidian	Ender Chest top
minecraft:creeper_head	Soul Sand	Creeper face
minecraft:creeper_wall_head	Soul Sand	Creeper face
minecraft:dragon_head	Soul Sand	Ender Dragon face
minecraft:dragon_wall_head	Soul Sand	Ender Dragon face
minecraft:player_head	Soul Sand	Steve face
minecraft:player_wall_head	Soul Sand	Steve face
minecraft:zombie_head	Soul Sand	Zombie face
minecraft:zombie_wall_head	Soul Sand	Zombie face
minecraft:skeleton_skull	Soul Sand	Skeleton face
minecraft:skeleton_wall_skull	Soul Sand	Skeleton face
minecraft:wither_skeleton_skull	Soul Sand	Wither Skeleton face
minecraft:wither_skeleton_wall_skull	Soul Sand	Wither Skeleton face
(all banners and wall banners)	Oak Planks	Banner post

How to reproduce

Summon the chest particle: /particle minecraft:block_marker chest
Note how the oak planks texture is shown instead of a more chest-like texture
Summon the creeper head particle: /particle minecraft:block_marker creeper_head
Note how the soul sand texture is shown instead of any texture related to creepers

How to fix

Since these particles pull the texture from the particle texture defined in that block's model, all that needs done to fix these cases is to change the referenced texture by those models, and possibly add in those texture files as well.

The resource pack attached, as of its v1.0 version, fixes this for all three chests, all twelve head-related blocks, and all thirty-two banner related blocks. The textures added are either Mojang assets or derivatives thereof.

Download fix resource pack (v1.0): BlockMarkerFix-21w42a-v1.0.zip

The textures added are as follows:

Chest and ender chest tops sourced from Bedrock Edition's assets
End portal and end gateway sourced from Bedrock Edition's assets, and resized to be 16x16 (from 16x17)
All non-dragon heads from the respective pre-1.8 item textures (may need Texture Update treatment)
Dragon head cropped from the ender dragon texture file (before Texture Update - not sure if it has changed since)
Banner cropped and assembled from the banner texture file

The resource pack also fixes many cases listed in MC-1874, as well as fixing ~~MC-2614~~ (which should probably be reviewed/reopened) and ~~MC-239268~~.