Bump operator version to v1.2.0-beta.1

[handlerww]

What problem does this PR solve?

Bump operator to v1.2.0-beta.1

What is changed and how does it work?

ref #3897
run script hack/bump-version.sh to bump TiDB Operator from v1.2.0-alpha.1 to v1.2.0-beta.1

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

NONE

[codecov-io]

Codecov Report

Merging #3898 (03f4f20) into master (2286554) will decrease coverage by 5.39%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3898      +/-   ##
==========================================
- Coverage   67.82%   62.42%   -5.40%     
==========================================
  Files         175      171       -4     
  Lines       18619    18134     -485     
==========================================
- Hits        12629    11321    -1308     
- Misses       4887     5716     +829     
+ Partials     1103     1097       -6     

Flag	Coverage Δ
e2e	?
unittest	62.42% <ø> (ø)

[csuzhangxc]

you need to update the PR description. 😹

[csuzhangxc]

LGTM

[handlerww]

/run-all-tests

[handlerww]

you need to update the PR description. 😹

Yeah, I forgot it. 😹

[handlerww]

/cc @july2993 @liubog2008

[DanielZhangQD]

LGTM

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• DanielZhangQD
• csuzhangxc

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[DanielZhangQD]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: f91e4ef

[DanielZhangQD]

/test pull-e2e-kind

[DanielZhangQD]

/test pull-e2e-kind

[ti-chi-bot]

@handlerww: Your PR was out of date, I have automatically updated it for you.

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[DanielZhangQD]

/merge