*: preparation for Go1.11 module cherry pick

[tiancaiamao]

What problem does this PR solve?

Preparation for cherry pick Go1.11 module to release-2.1 branch

What is changed and how it works?

Cherry pick the later three PRs is quite easy, nearly no conflict.

commit 3727e15f259ddf4f3d3c5945ec3a7b4a4c55abde (HEAD -> cherry-module, tiancaiamao/cherry-module)
Author: tiancaiamao <tiancaiamao@gmail.com>
Date:   Wed Nov 21 21:07:26 2018 +0800

    *: move parser to a separate repository

commit b06a5d4a71f8385584189dfd2661fa2130b9a362
Author: tiancaiamao <tiancaiamao@gmail.com>
Date:   Wed Oct 24 13:19:10 2018 +0800

    *: make parser package dependency as small as possible (#7989)

commit 24c04191addc5665d989a872f8483371bf3e58b6
Author: tiancaiamao <tiancaiamao@gmail.com>
Date:   Sun Oct 21 13:21:26 2018 +0800

    *: move `Statement` and `RecordSet` from ast to sqlexec package (#7970)

commit 240db91627ac5ee086e5a85a98843a683c698349
Author: tiancaiamao <tiancaiamao@gmail.com>
Date:   Fri Oct 19 19:37:55 2018 +0800

    *: move ast.NewValueExpr to standalone parser_driver package (#7952)
    
    Make the ast package get rid of the dependency of types.Datum

This one is quite difficult, I rewrite the changes from the original PR #8036

    *: move parser to a separate repository

To make CI pass, release-2.1 need a special parser branch which I'll push later.

Still WIP, there are two test cases fail.

---

This change is 

[zz-jason]

@tiancaiamao CI failed.

[tiancaiamao]

Some important notes:

#8398 is reverted in this PR, you can add it back again after my work finish @jackysp

In this commit https://github.com/pingcap/tidb/pull/7862/files#diff-c31b8654bc3f8f52137403cf3dc617faL571
GetTableColumnID is removed from the latest parser, so I add a GetTableColumnID in the util/admin package @crazycs520

#7842 is not in the release-2.1 branch, so the parser used by release-2.1 reset the changes @eurekaka

[tiancaiamao]

/run-all-tests tidb-test=release-2.1

[tiancaiamao]

PTAL @zz-jason @jackysp

[zz-jason]

LGTM

[jackysp]

Great work! @tiancaiamao
I'll approve the pr when all the tests passed.

[tiancaiamao]

/run-common-test tidb-test=pr/657

[tiancaiamao]

/run-common-test tidb-test=pr/657

[tiancaiamao]

/run-integration-ddl-test tidb-test=pr/657

[tiancaiamao]

/run-integration-common-test tidb-test=pr/657

[jackysp]

LGTM