Sync interfaces/ with @webref/idl 3.12.4

[github-actions]

This automated pull request updates interfaces/*.idl from @webref/idl 3.12.4.

Before merging, please check that any tests that depend on the updated IDL files still work. In particular, check for gray boxes as the wpt.fyi check status, which usually means that some tests have regressed.

If additional changes are needed, please manually create another PR based on this one.

See the workflow for how this pull request was created, and the README for how the IDL files in this directory are used.

[foolip]

The "idl_test validation" test is failing because of the new static json() method:

Validation error at line 29 in fetch, inside `interface mixin Body`:
] Promise<any> json();
               ^ The operation "json" has already been defined for the base interface "Response" either in itself or in a mixin

This is due to whatwg/webidl#1098 + whatwg/fetch#1392.