*:upgrade mockery to make sure this project builds under go 1.18

[longfangsong]

close #1366 (replace it)

Current version of mockery used by this project does not support go 1.18. According to the suggestion of the maitainer of this project, we should upgrade it and drop the support of old Golang compiler.

This PR do the upgrade work and push the minium supported Golang version to 1.18

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[codecov-commenter]

Codecov Report

Merging #1382 (f3934d6) into master (65d9c82) will decrease coverage by 0.00%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1382      +/-   ##
==========================================
- Coverage   29.44%   29.43%   -0.01%     
==========================================
  Files         128      128              
  Lines       10519    10525       +6     
  Branches       99       99              
==========================================
+ Hits         3097     3098       +1     
- Misses       7242     7247       +5     
  Partials      180      180              

Flag	Coverage Δ
be_unit_test	27.57% <0.00%> (-0.01%)	:arrow_down:
e2e_test	63.36% <ø> (ø)

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[breezewish]

I guess the Golang compiler version specified in the CI yaml also need to be updated.

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[ti-chi-bot]

@longfangsong: PR needs rebase.

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