Allow more items on skewers; cookable snake meat and spider legs

[themias]

About the PR

This PR allows all cutlets, lingzhi mushrooms, cooked snake meat, and cooked spider legs to go on skewers.
It also allows snake meat and spider legs to be cooked, and spider legs to drop from butchered giant spiders.

I don't think this is blocked by any freezes, as it doesn't add any recipes or modify microwave code.
I can also split this PR into smaller ones if desired.

Mostly fixes #41223 (one sprite unused, and alpha sprites are not currently supported)

Why / Balance

It is confusing for some meat to be cookable and usable in food sequences, but others aren't. This makes the behavior more intuitive for the player. It also gives more purpose to the grill and gives certain ingredients more utiliy.

Technical details

We had bits and pieces of these things in the code, but this PR just brings them together. There was some clean up to do, e.g. cooked spider legs did not parent raw spider legs, meat cutlets were missing their sequence name, etc.

Food sequences use sprite specifiers, so we can't use alpha/grayscale sprites until coloring support is added for them: space-wizards/RobustToolbox#6519

Media

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an in-game showcase.

Changelog

🆑

• tweak: Giant spiders drop legs when butchered
• tweak: Snake meat and spider legs can be cooked on the grill
• tweak: Snake meat and spider legs can go on skewers, burgers and tacos
• tweak: All meat cutlets and lingzhi mushrooms can go on skewers

[github-actions]

RSI Diff Bot; head commit e447e6e merging into 1b992ce
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/Objects/Consumable/Food/meat.rsi

State	Old	New	Status
snake-cooked			Added

Edit: diff updated after e447e6e

[themias]

Looks like this package was marked vulnerable in the last 24 hours:

/home/runner/work/space-station-14/space-station-14/Content.Server.Database/Content.Server.Database.csproj : error NU1901: Warning As Error: Package 'System.Security.Cryptography.Xml' 9.0.0 has a known low severity vulnerability, GHSA-37gx-xxp4-5rgx [/home/runner/work/space-station-14/space-station-14/Content.Server/Content.Server.csproj]

[Princess-Cheeseballs]

Frozen until #43412 is merged