lease: keep alive Leadership immediately after finish the election of leader

[HuSharp]

What problem does this PR solve?

Issue Number: Ref #7251

What is changed and how does it work?

fix `etcdserver: requested lease not found`

// granted 3s
[2024/01/15 02:55:44.603 +00:00] [INFO] [server.go:1657] ["start to campaign PD leader"] [campaign-leader-name=tc-pd-0]
[2024/01/15 02:55:44.604 +00:00] [INFO] [lease.go:66] ["lease granted"] [lease-id=6177967866903092454] [lease-timeout=3] [purpose="leader election"]
// commit too slow
[2024/01/15 02:55:45.092 +00:00] [WARN] [etcdutil.go:152] ["kv gets too slow"] [request-key=/pd/7324144488088872732/member/5619078945150009647/leader_priority] [cost=2.764836133s] []
[2024/01/15 02:55:50.563 +00:00] [INFO] [etcdutil.go:314] ["update endpoints"] [num-change=3->2] [last-endpoints="[http://tc-pd-0.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379,http://tc-pd-2.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379,http://tc-pd-1.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379]"] [endpoints="[http://tc-pd-0.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379,http://tc-pd-2.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379]"]
[2024/01/15 02:55:50.564 +00:00] [INFO] [etcdutil.go:314] ["update endpoints"] [num-change=3->2] [last-endpoints="[http://tc-pd-2.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379,http://tc-pd-0.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379,http://tc-pd-1.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379]"] [endpoints="[http://tc-pd-2.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379,http://tc-pd-0.tc-pd-peer.endless-ha-test-tps-6030041-1-263.svc:2379]"]
[2024/01/15 02:55:51.020 +00:00] [WARN] [etcd_kv.go:174] ["txn runs too slow"] [response="{\"header\":{\"cluster_id\":10740517942856960270,\"member_id\":17574458819109638910,\"revision\":1502,\"raft_term\":16},\"succeeded\":true,\"responses\":[{\"Response\":{\"ResponsePut\":{\"header\":{\"revision\":1502}}}}]}"] [cost=6.415850764s] []
// `02:55:51` pass 7s than granted
[2024/01/15 02:55:51.020 +00:00] [INFO] [leadership.go:181] ["check campaign resp"] [resp="{\"header\":{\"cluster_id\":10740517942856960270,\"member_id\":17574458819109638910,\"revision\":1502,\"raft_term\":16},\"succeeded\":true,\"responses\":[{\"Response\":{\"ResponsePut\":{\"header\":{\"revision\":1502}}}}]}"]
[2024/01/15 02:55:51.020 +00:00] [INFO] [leadership.go:190] ["write leaderData to leaderPath ok"] [leader-key=/pd/7324144488088872732/leader] [purpose="leader election"]
[2024/01/15 02:55:51.020 +00:00] [INFO] [server.go:1683] ["campaign PD leader ok"] [campaign-leader-name=tc-pd-0]
[2024/01/15 02:55:51.020 +00:00] [INFO] [server.go:1691] ["initializing the global TSO allocator"]
[2024/01/15 02:55:51.020 +00:00] [INFO] [tso.go:160] ["start to sync timestamp"] []
// check lease failed
[2024/01/15 02:55:51.020 +00:00] [INFO] [lease.go:155] ["start lease keep alive worker"] [interval=1s] [purpose="leader election"]
[2024/01/15 02:55:51.020 +00:00] [WARN] [lease.go:170] ["lease keep alive failed"] [purpose="leader election"] [start=2024/01/15 02:55:51.020 +00:00] [error="etcdserver: requested lease not found"]
...
[2024/01/15 02:55:51.038 +00:00] [INFO] [lease.go:187] ["stop lease keep alive worker"] [purpose="leader election"]
[2024/01/15 02:55:51.039 +00:00] [INFO] [server.go:1657] ["start to campaign PD leader"] [campaign-leader-name=tc-pd-0]
...

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

Release note

None.

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[codecov]

Codecov Report

Merging #7707 (4292223) into master (cd0ffba) will decrease coverage by 0.18%.
Report is 1 commits behind head on master.
The diff coverage is 96.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7707      +/-   ##
==========================================
- Coverage   73.69%   73.51%   -0.18%     
==========================================
  Files         432      432              
  Lines       47805    47787      -18     
==========================================
- Hits        35229    35132      -97     
- Misses       9572     9637      +65     
- Partials     3004     3018      +14     

Flag	Coverage Δ
unittests	73.51% <96.66%> (-0.18%)	⬇️

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[lhy1024]

Do we still need this pr? Will it need to be picked to 7.5?

[HuSharp]

Do we still need this pr? Will it need to be picked to 7.5?

I don't think this pr is needed for now, Let's close it for now.