[MC-207557] Frozen hearts in hardcore mode look identical to frozen hearts in survival mode

This is inconsistent with all other heart textures under some affliction.

Survival heart appearences:

[media]

Hardcore heart appearences:

[media]

Mockup of what frozen hardcore hearts could look like, achieved through a resource pack:

[media]

Related issues

migrated 2020-12-04T10:15:37Z

[media][media][media][media][media][media][media]

muzikbike 2020-12-04T10:17:34Z

An example of what hardcore hearts could look like, as achieved through a resource pack:

[media]

Avoma 2021-01-13T12:14:22Z

Can confirm in 20w51a.

Avoma 2021-01-25T12:27:58Z

Can confirm in 21w03a.

Avoma 2021-02-04T11:56:23Z

Can confirm in 21w05a.

Avoma 2021-02-05T10:18:16Z

Can confirm in 21w05b.

Avoma 2021-02-14T16:44:26Z

Can confirm in 21w06a.