upgrade go.etcd.io/etcd to fix panic in unit test with go1.14

[amyangfei]

What problem does this PR solve?

Fix panic in unit test with go >= 1.14. ref: etcd-io/bbolt#201

fatal error: checkptr: unsafe pointer conversion

goroutine 124 [running]:
runtime.throw(0x1dee7a4, 0x23)
        /home/tidb/.gvm/gos/go1.14.4/src/runtime/panic.go:1116 +0x72 fp=0xc0001c97a0 sp=0xc0001c9770 pc=0x4678e2
runtime.checkptrAlignment(0xc000116a90, 0x1cd75c0, 0x1)
        /home/tidb/.gvm/gos/go1.14.4/src/runtime/checkptr.go:20 +0xc9 fp=0xc0001c97d0 sp=0xc0001c97a0 pc=0x438b99
go.etcd.io/bbolt.(*Bucket).write(0xc0001c9948, 0x0, 0x0, 0x0)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/bbolt@v1.3.3/bucket.go:624 +0x15c fp=0xc0001c9838 sp=0xc0001c97d0 pc=0x161b4dc
go.etcd.io/bbolt.(*Bucket).CreateBucket(0xc0001280f8, 0x2c836b0, 0x7, 0x7, 0xc0001c9ba8, 0x16d7096, 0xc000156748)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/bbolt@v1.3.3/bucket.go:181 +0x465 fp=0xc0001c99f8 sp=0xc0001c9838 pc=0x1617925
go.etcd.io/bbolt.(*Tx).CreateBucket(...)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/bbolt@v1.3.3/tx.go:108
go.etcd.io/etcd/mvcc/backend.(*batchTx).UnsafeCreateBucket(0xc000125a10, 0x2c836b0, 0x7, 0x7)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/etcd@v0.5.0-alpha.5.0.20191211224106-0dc78a144b31/mvcc/backend/batch_tx.go:72 +0x9c fp=0xc0001c9c28 sp=0xc0001c99f8 pc=0x16487ac
go.etcd.io/etcd/mvcc/backend.(*batchTxBuffered).UnsafeCreateBucket(0xc000125a10, 0x2c836b0, 0x7, 0x7)
        <autogenerated>:1 +0x62 fp=0xc0001c9c58 sp=0xc0001c9c28 pc=0x16547a2
go.etcd.io/etcd/etcdserver/api/membership.mustCreateBackendBuckets(0x20fdf80, 0xc000154d00)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/etcd@v0.5.0-alpha.5.0.20191211224106-0dc78a144b31/etcdserver/api/membership/store.go:166 +0x109 fp=0xc0001c9cf0 sp=0xc0001c9c58 pc=0x16ea779
go.etcd.io/etcd/etcdserver/api/membership.(*RaftCluster).SetBackend(...)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/etcd@v0.5.0-alpha.5.0.20191211224106-0dc78a144b31/etcdserver/api/membership/cluster.go:242
go.etcd.io/etcd/etcdserver.NewServer(0x1dbd3be, 0x7, 0x0, 0x0, 0x0, 0x0, 0xc000154400, 0x1, 0x1, 0xc000154380, ...)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/etcd@v0.5.0-alpha.5.0.20191211224106-0dc78a144b31/etcdserver/server.go:406 +0x6493 fp=0xc0001cb6a0 sp=0xc0001c9cf0 pc=0x1852303
go.etcd.io/etcd/embed.StartEtcd(0xc00014ea00, 0xc00030cb00, 0x0, 0x0)
        /home/tidb/.gvm/pkgsets/go1.14.4/global/pkg/mod/go.etcd.io/etcd@v0.5.0-alpha.5.0.20191211224106-0dc78a144b31/embed/etcd.go:211 +0x11d3 fp=0xc0001cd780 sp=0xc0001cb6a0 pc=0x19fd123
github.com/pingcap/ticdc/pkg/etcd.SetupEmbedEtcd(0xc000116500, 0x20, 0x20, 0x7f9f776dde20, 0xc00006a990, 0x43eb6c)
        /home/tidb/code/ticdc/pkg/etcd/etcd.go:60 +0x33d fp=0xc0001cd8c0 sp=0xc0001cd780 pc=0x1a8f2bd
github.com/pingcap/ticdc/cdc/roles/storage.(*etcdSuite).SetUpTest(0xc000398dc0, 0xc0003e00f0)
        /home/tidb/code/ticdc/cdc/roles/storage/etcd_test.go:48 +0x6c fp=0xc0001cdb18 sp=0xc0001cd8c0 pc=0x1a9154c
runtime.call32(0xc000124ae0, 0xc00013a038, 0xc0001127e0, 0x1000000010)

What is changed and how it works?

upgrade go.etcd.io/etcd to latest

Check List

Tests

• Unit test
• Integration test

Code changes

Release note

• No release note

[amyangfei]

/run-integration-tests

[codecov-commenter]

Codecov Report

Merging #755 into master will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master       #755   +/-   ##
===========================================
  Coverage   33.6628%   33.6628%           
===========================================
  Files            92         92           
  Lines         10115      10115           
===========================================
  Hits           3405       3405           
  Misses         6380       6380           
  Partials        330        330           

[zier-one]

/lgtm

[overvenus]

/lgtm

[overvenus]

/merge

[ti-srebot]

/run-all-tests

[overvenus]

CI canceled, need to merge release blocker first.

[amyangfei]

/merge

[overvenus]

Please make sure it compatible with release-4.0 PD.

[ti-srebot]

/run-all-tests

[amyangfei]

/run-integration-tests tidb=release-4.0 tikv=release-4.0 pd=release-4.0

[ti-srebot]

@amyangfei merge failed.

[amyangfei]

Please make sure it compatible with release-4.0 PD.

integration test with release-4.0 tidb/tikv/pd works well
https://internal.pingcap.net/idc-jenkins/blue/organizations/jenkins/cdc_ghpr_integration_test/detail/cdc_ghpr_integration_test/1622/pipeline

[amyangfei]

/merge

[ti-srebot]

/run-all-tests