Text strikethrough cannot be retextured

Relates to: MC-268805 MC-268927 MC-269079 MC-269364 MC-269365 MC-269437 MC-269438 MC-269443 MC-269447 MC-269938 MC-269939 MC-270254 MC-270255 MC-270256 MC-270257 MC-270258 MC-270260 MC-270324 MC-270766 MC-273060 MC-275778 MC-276442 MC-276635 MC-276664 MC-277504 MC-277696 MC-277705 MC-277706 MC-277877 MC-278170

The bug

Like underlines but unlike all other aspects of text, there does not appear to exist a texture file for the strikethrough displayed over text.

Example strikethrough text

/tellraw @p {"text": "\u0020", "strikethrough": true}

Expected results

The strikethrough would have a texture file or some other configuration method allowing resource packs to change how it looks.

Actual results

It does not.