Stream Duties Client Implementation (#5867)

* include validator client stream

* Update validator/client/validator_attest.go

* gazelle

* rem extraneous logs

* fixing tests

* resolve most tests

* gaz

* add lock

* ivan feedback

* pass tests for update protect

* gaz

* duties gaz

* no need for canonical head slot

* fix ctx leak

* fmt

* add in feature flag

* add streaming subpackage

* add polling/streaming separation

* able to build

* fix duplicate package names

* fix polling

* imports

* confirm it works

* fixed up comment

* go lint comments

* gaz

* build

* Update validator/client/streaming/service_test.go

Co-authored-by: terence tsao <terence@prysmaticlabs.com>

* tidy

* fmt

* add stream duties to e2e

* add stream duties to e2e flags

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
Co-authored-by: terence tsao <terence@prysmaticlabs.com>

nogo_config.json

@@ -13,7 +13,8 @@
   },
   "lostcancel": {
     "exclude_files": {
-      "validator/client/runner.go": "No need to cancel right when goroutines begin",
+      "validator/client/streaming/runner.go": "No need to cancel right when goroutines begin",
+      "validator/client/polling/runner.go": "No need to cancel right when goroutines begin",
       "external/.*": "Third party code"
     }
   },