* adding feature flag for LogBroadcaster, true by default

* fix test part 1

* fix test

* fix more test

* fix test

* fix test

* one more

* edit changeset

* update changeset

(cherry picked from commit bf6618d)

* add functions for newHead polling

* add new flag, NewHeadsPollInterval

* fix test

* fix test

* step for adding polling new head impelmentation and sync+outOfSync loop handling logic. To add unit test

* fix lint

* add unit test

* update changeset

* update comments

* simplify step 1, need to fix test

* remove tests, no longer needed

* fix lint

* fix mock

* fix simulated client

* update interface

* rm more

* temp update for testing log level

* temp update

* revert modification to polygon toml

* enable heap monitoring

* enable for testing

* revert

* Dmytro's comments

* make func private

* fix test

* add polling support for SubscribeNewHeaddocke

* update log level

(cherry picked from commit 5acca37)

…ion in rpc client (#14534)

* polling subscription to be registered

* adding changeset

* fix Subscribe new head

* add test

* update changeset

* fix lint

* fix deadlock and add unit test for http polling sub

* update changeset

* adding sub closed check and remove import

* add unit test coverage for http polling subscribeToHeads

* update test

* address comments part 1

* clean

* part 2

* fix lint

* fix lint

(cherry picked from commit de268e98b8d68a284e1260297925b91c5d2411bc)

* WS URL can be optional

* add changeset

* change

* make WSURL optional

* fix test, and enforce SubscribeFilterLogs to fail when ws url not provided

* add comments

* update changeset

* update dial logic and make ws optional not required

* fix test

* fix

* fix lint

* address comments

* update comments

* fix test

* add check when both ws and http missing

* add test and add restrictions

* add comment

* revert outdated change

* remove extra line

* fix test

* revert changes from rpc client

* unintended change

* remove unused

* update verification logic

* add test fix

* modify unit test to cover logbroadcaster enabled false

* update doc

* udpate changeset

* address PR comments

* address pr comments

* update invalid toml config

* fix test

* ws required for primary nodes when logbroadcaster enabled

* minor

* Dmytro's comments

* fix nil ptr, more fix to come

* fix make

* refactor function sig

* fix test

* fix

* make ws pointer

* fix

* fix make

* address comments

* fix lint

* fix make

* fix make

* fix make

* fix rpc disconnect with optional ws url

---------

Co-authored-by: Dmytro Haidashenko <dmytro.haidashenko@smartcontract.com>
(cherry picked from commit 5d96be59a27f68f2f491a7d9f8cb0b2af4e0e835)

* add test

* add more test

* add changeset

(cherry picked from commit da5910eda98882f8a1b9ccc52b99afa223fb3997)

This reverts commit 7c91b65.

…ded into this cherry-pick

…issues were not caused by the PR changes)

This reverts commit 494fc05.

…(linter issues were not caused by the PR changes)"

This reverts commit 9093754.