[SYCL][E2E] Add build-mode and run-mode to list of build-specific features (#17363)

We throw an error if a non build-specific feature is reported as true
when in build-only (we expect this to never be the case), so when we do
`UNSUPPORTED: build-only` this would make the test unresolved.

Also if we don't have `run-mode` marked as a build specific feature when
in build-only mode a test marked as `REQUIRES: run-mode` would run,
since that feature would be considered "unknown" rather than false.

Author: ayylol

sycl/test-e2e/E2EExpr.py

@@ -3,6 +3,8 @@
 
 class E2EExpr(BooleanExpression):
     build_specific_features = {
+        "run-mode",
+        "build-mode",
         "preview-mode",
         "target-spir",
         "target-nvidia",