add global clearAllAuctions method (#11912)

Author: mmoschovas

src/prebid.js

@@ -869,6 +869,10 @@ pbjsInstance.getHighestCpmBids = function (adUnitCode) {
   return targeting.getWinningBids(adUnitCode);
 };
 
+pbjsInstance.clearAllAuctions = function () {
+  auctionManager.clearAllAuctions();
+};
+
 if (FEATURES.VIDEO) {
   /**
    * Mark the winning bid as used, should only be used in conjunction with video

test/spec/unit/pbjs_api_spec.js

@@ -3757,4 +3757,15 @@ describe('Unit: Prebid Module', function () {
       sinon.assert.calledOnce(adapterManager.callBidBillableBidder);
     });
   });
+
+  describe('clearAllAuctions', () => {
+    after(() => {
+      resetAuction();
+    });
+    it('clears auction data', function () {
+      expect(auctionManager.getBidsReceived().length).to.not.equal(0);
+      $$PREBID_GLOBAL$$.clearAllAuctions();
+      expect(auctionManager.getBidsReceived().length).to.equal(0);
+    });
+  });
 });