[Feature Request] Add .SRCINFO integrity check argument

Is your feature request related to a problem? Please describe.

Considering that .SRCINFO is not diffed, a malicious packager could insert malware into .SRCINFO, of which yay will trust.

Describe the solution you'd like

One of two methods:

• At build time, .SRCINFO could be regenerated with makepkg, and diffed against the provided .SRCINFO.
• Provided .SRCINFO is ignored and regenerated from PKGBUILD.

Describe alternatives you've considered

Including .SRCINFO in diffing, but that would require you to carefully examine both the PKGBUILD and .SRCINFO for if they match, which could be automated.

Additional context

None.