Refine some include headers & add option ENABLE_FAILPOINTS (#2296)

[ti-srebot]

cherry-pick #2296 to release-5.1
You can switch your code base to this Pull Request by using git-extras:

# In tics repo:
git pr https://github.com/pingcap/tics/pull/2479

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tics.git pr/2479:release-5.1-9d51ac4e0c64

---

What problem does this PR solve?

Issue Number: related to #2295

What is changed and how it works?

• Only include these files when need:
  • <Common/Config/cpptoml.h>
  • <tipb/select.pb.h> in <Interpreters/TimezoneInfo.h>
  • <Flash/Coprocessor/DAGContext.h> in <Interpreters/Context.h>
• Add "ENABLE_FAILPOINTS" so that we can build a release binary with failpoint enabled with
  cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DENABLE_TESTS=OFF -DENABLE_FAILPOINTS=ON ..

This can remove dependency for some targets (page_storage for example) and make it easier to write and run unit tests.

Related changes

Check List

Tests

• No code

Side effects

Release note

• No release note

[JaySon-Huang]

/run-all-tests

[JaySon-Huang]

/run-all-tests