add configuration parameter for RawKV backoff (#246)#249

ti-srebot wants to merge 1 commit intotikv:release-3.1tikv/client-java:release-3.1from

ti-srebot:release-3.1-5aebd12a37a9ti-srebot/client-java:release-3.1-5aebd12a37a9Copy head branch name to clipboard