*: add version check before start (#311)

[3pointer]

cherry-pick #311 to release 3.1

What problem does this PR solve?

Resolve #301

What is changed and how it works?

Add cluster version check when br start

Check List

Tests

• Unit test

Related changes

• Need to cherry-pick to the release branch

Release Note

• Feature: Add version check at beginning in order to avoid version mismatch.

[codecov]

Codecov Report

Merging #335 into release-3.1 will increase coverage by 0.21%.
The diff coverage is 76.28%.

@@               Coverage Diff               @@
##           release-3.1     #335      +/-   ##
===============================================
+ Coverage        70.81%   71.02%   +0.21%     
===============================================
  Files               48       48              
  Lines             5040     5081      +41     
===============================================
+ Hits              3569     3609      +40     
+ Misses             991      987       -4     
- Partials           480      485       +5     

Impacted Files	Coverage Δ
pkg/task/restore.go	54.80% <57.14%> (ø)
pkg/task/common.go	63.30% <66.66%> (+0.15%)	⬆️
pkg/conn/conn.go	78.73% <80.00%> (-0.44%)	⬇️
pkg/utils/version.go	88.88% <80.64%> (-11.12%)	⬇️
pkg/utils/math.go	87.50% <87.50%> (ø)
pkg/restore/import.go	70.99% <100.00%> (ø)
pkg/task/backup.go	60.99% <100.00%> (ø)
pkg/task/backup_raw.go	55.88% <100.00%> (ø)
pkg/task/restore_raw.go	58.73% <100.00%> (ø)
pkg/mock/mock_cluster.go	72.91% <0.00%> (-2.09%)	⬇️
... and 6 more

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[kennytm]

LGTM