builtin: add json quote

[overbool]

This is my first PR to tidb, so please be gentle ;-)

What problem does this PR solve?

a part of #7546

What is changed and how it works?

add a built in function json_quote

Check List

Tests

• Unit test
• Integration test

Code changes

• Has interface methods change

Related changes

• Need to be included in the release note

---

This change is 

[sre-bot]

Hi contributor, thanks for your PR.

This patch needs to be approved by someone of admins. They should reply with "/ok-to-test" to accept this PR for running test automatically.

[CLAassistant]

All committers have signed the CLA.

[shenli]

@overbool Thanks!

[shenli]

/ok-to-test

[shenli]

/run-all-tests

[crazycs520]

LGTM

[zz-jason]

@overbool any update?

[overbool]

@overbool any update?

Sorry for my delay, I will update it in a few day.

[zz-jason]

@overbool friendly ping 😄 Any update?

[zz-jason]

LGTM

[codecov-io]

Codecov Report

Merging #7832 into master will increase coverage by <.01%.
The diff coverage is 52.38%.

@@            Coverage Diff             @@
##           master    #7832      +/-   ##
==========================================
+ Coverage   67.24%   67.25%   +<.01%     
==========================================
  Files         371      371              
  Lines       77203    77223      +20     
==========================================
+ Hits        51916    51937      +21     
- Misses      20645    20647       +2     
+ Partials     4642     4639       -3

Impacted Files	Coverage Δ
expression/distsql_builtin.go	27.94% <0%> (-0.11%)	⬇️
types/json/binary_functions.go	84.33% <0%> (-0.33%)	⬇️
expression/builtin_json.go	76.11% <64.7%> (-0.04%)	⬇️
store/tikv/gcworker/gc_worker.go	41.14% <0%> (-0.43%)	⬇️
util/filesort/filesort.go	76.48% <0%> (+0.31%)	⬆️
ddl/delete_range.go	79.36% <0%> (+4.23%)	⬆️
util/systimemon/systime_mon.go	100% <0%> (+20%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4ad4684...14fd406. Read the comment docs.