[Test] (tools/cts): waive api.coverage's fbo-surface-type wrapper-FBO artifact

KHR-GL3{0,1,2,3}.api.coverage's ReadBuffer coverage sub-test captures
GL_READ_BUFFER while dEQP's own fbo-surface-type wrapper FBO is bound
(a real, non-zero-named FBO, not framebuffer 0), then later deletes an
unrelated FBO of its own. Per the GL spec, deleting a bound FBO
implicitly rebinds framebuffer target 0 - the true default framebuffer
this time, not the wrapper - and restoring the captured
GL_COLOR_ATTACHMENTn value against it correctly raises GL_INVALID_ENUM
(only FRONT/BACK-style tokens are valid there). This is a spec-correct
response to a --deqp-surface-type=fbo-only test-methodology artifact,
not a MobileGL conformance defect, and cannot occur on a real
window/pbuffer-backed run where framebuffer 0 is genuinely bound
throughout. Add a waiver (dEQP's own mechanism for exactly this kind of
known non-defect) instead of weakening the (correct) validation, and
wire --waiver-file through run_cts_local.py.

tools/cts/scripts/run_cts_local.py

@@ -65,6 +65,8 @@ def main():
                     help="seconds before killing one glcts invocation (a wedged case never returns)")
     ap.add_argument("--skip-file", default=None,
                     help="file of case names to exclude, e.g. cases known to wedge the host")
+    ap.add_argument("--waiver-file", default=None,
+                    help="--deqp-waiver-file value, e.g. tools/cts/waivers/mobilegl-fbo-harness.xml")
     ap.add_argument("--env", action="append", default=[], metavar="K=V",
                     help="extra environment variable for glcts (repeatable)")
     args = ap.parse_args()
@@ -135,6 +137,8 @@ def main():
             "--deqp-log-shader-sources=disable",
             f"--deqp-log-filename={qpa}",
         ]
+        if args.waiver_file:
+            cmd.append(f"--deqp-waiver-file={os.path.abspath(args.waiver_file)}")
         timed_out = False
         try:
             # RLIMIT_CORE=0: MobileGL asserts abort with a core dump, and writing