Add dawn version hash to cache keys.

Motivation is to simplify cache evicting by reusing the LRU to evict stale entries from older Dawn versions since there isn't already a simple cache busting solution. The dawn version will just be pushed into the cache keys instead so old version entries will eventually be retired.

- Removes the fingerprint from the GetCachingInterface API on DawnNative.
- Adds the "fingerprint", which was just the hash, to the device;s cache key directly instead.

Bug: dawn:549
Change-Id: I573aa03a2bb96dfe044293b1176d3a7746725572
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94140
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Loko Kung <lokokung@google.com>

src/dawn/native/Device.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 
 #include "dawn/common/Log.h"
+#include "dawn/common/Version_autogen.h"
 #include "dawn/native/Adapter.h"
 #include "dawn/native/AsyncTask.h"
 #include "dawn/native/AttachmentState.h"
@@ -208,7 +209,7 @@ DeviceBase::DeviceBase(AdapterBase* adapter, const DeviceDescriptor* descriptor)
     // Record the cache key from the properties. Note that currently, if a new extension
     // descriptor is added (and probably handled here), the cache key recording needs to be
     // updated.
-    mDeviceCacheKey.Record(adapterProperties, mEnabledFeatures.featuresBitSet,
+    mDeviceCacheKey.Record(kDawnVersion, adapterProperties, mEnabledFeatures.featuresBitSet,
                            mEnabledToggles.toggleBitset, cacheDesc);
 }