OSD: Add warning for hash cache setting overriding texture replace/dump

[TheTechnician27]

Description of Changes

• Make the warning for Texture Preloading not Full account for if the user has texture replacement/dumping on.
  • According to @JordanTheToaster and @RedPanda4552, neither of these options will actually work while the hash cache isn't full.
  • The user should be informed if their settings will not work for some reason.
  • There's a special warning if it's caused by the GameDB rather than user choice.
• Grey out options for texture replacement if texture preloading set to none or partial by user.
  • I could've just hidden the whole tab, but the search directory widget is still active.
  • Still need the OSD message since:
    1. greying out the options doesn't mean they weren't on before.
    2. you can edit settings from the .ini file.
  • This behavior is mirrored in BPM.
• Add two functions to GameDatabaseSchema::Entry which let you look up speed hack and GS HW fix values.
  • Unlike the other values in Entry, speed hacks and GS HW fixes are in a vector of pairs.
  • Thus, fetching their associated values if they exist is annoying.
  • There's no good reason why something with access to the entry shouldn't be able to easily just query this.
• Make it so that OSD hardware settings warnings do not appear when using the Null Renderer.
  • It is just as unaffected by these as the Software Renderer is.

Example Screenshots

Ignore the first two lacking an icon; this is from an earlier build.

Took up what I thought was a reasonable suggestion from RedPanda4552.

Suggested Testing Steps

• Make sure that the message works.
• For testing the GameDB one specifically, I recommend just editing the DB yourself.
  • Games which actually don't use full hash cache are scarce.
• Make sure that the option greying out works.
• The game entry query functions are pretty straightforward.
  • There shouldn't be a need to test these if you just look at them.

Did you use AI to help find, test, or implement this issue or feature?

No.

[RedPanda4552]

Looks good, review only, can't smoke test right now.

[kamfretoz]

LGTM.

[F0bes]

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[F0bes]

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