feat: support disabled strings properly

- Parse non-`true` strings and treat `@False` as
  specified-but-not-actually-disabled.
- Accept conditional values for `disabled`.

Author: ErichDonGubler

moz-webgpu-cts/src/main.rs

@@ -547,15 +547,15 @@ fn run(cli: Cli) -> ExitCode {
                 } = test;
 
                 let TestProps {
-                    is_disabled,
+                    disabled,
                     expected,
                     implementation_status: _,
                     tags: _,
                 } = properties;
 
                 let test_name = Arc::new(test_name);
 
-                if is_disabled {
+                if disabled.is_some_and(|d| d.iter().any(|(_, val)| val.is_disabled())) {
                     analysis.for_each_platform_mut(|analysis| {
                         analysis
                             .tests_with_disabled_or_skip
@@ -672,13 +672,13 @@ fn run(cli: Cli) -> ExitCode {
 
                     let Subtest { properties } = subtest;
                     let TestProps {
-                        is_disabled,
+                        disabled,
                         expected,
                         implementation_status: _,
                         tags: _,
                     } = properties;
 
-                    if is_disabled {
+                    if disabled.is_some_and(|d| d.iter().any(|(_, val)| val.is_disabled())) {
                         analysis
                             .windows
                             .tests_with_disabled_or_skip