Auto merge of #23282 - josephhutch:OscillatorNodeType, r=ferjm

Implemented type attribute for OscillatorNode interface

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Please see https://github.com/servo/media/pull/242 for implementation of the new oscillator node message.

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- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix #___ (GitHub issue number if applicable)

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tests/wpt/metadata/webaudio/idlharness.https.window.js.ini

@@ -41,9 +41,6 @@
   [AudioWorkletNode interface: worklet_node must inherit property "port" with the proper type]
     expected: FAIL
 
-  [OscillatorNode interface: attribute type]
-    expected: FAIL
-
   [AudioContext interface: operation suspend()]
     expected: FAIL
 
@@ -140,9 +137,6 @@
   [AudioNode interface: calling connect(AudioParam, unsigned long) on new DynamicsCompressorNode(context) with too few arguments must throw TypeError]
     expected: FAIL
 
-  [OscillatorNode interface: new OscillatorNode(context) must inherit property "type" with the proper type]
-    expected: FAIL
-
   [MediaStreamAudioDestinationNode interface: attribute stream]
     expected: FAIL