golang revert causing many n1ql regression

Regressions are seen across the board for n1ql tests that are index heavy.

6589 - http://perf.jenkins.couchbase.com/job/arke-multi-client/5196/ - 75.0
6588 - http://perf.jenkins.couchbase.com/job/arke-multi-client/5195/ - 89.0

http://changelog.build.couchbase.com/?product=couchbase-server&fromVersion=7.0.2&fromBuild=6588&toVersion=7.0.2&toBuild=6589&f_indexing=on&f_product-metadata=off

• Commit: 53bda0e7649344f133bb74a6774e4999323f0155 in build: couchbase-server-7.0.2-6589
  Revert "MB-44731 [BP to 7.0.1] Move indexer and projector go-runtime to version 1.16.5" This reverts commit 88d90428281a068db6dc3c952680f97a3af569c9. Original commit was done for MB-46323. Reverting the golang upgrade due to the issues seen in MB-44731 and MB-47600. Change-Id: Ibc8c0688d30a701cf0330277eb2c290465fa37c2
  Author: Deepkaran Salooja <deepkaran@couchbase.com>
  Committer: Deepkaran Salooja <deepkaran@couchbase.com>
   
  Looks like golang revert is source of the regression