switch mock to uber fork of gomock

[rekby]

I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/?lang=en

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Other information

[github-actions]

summary

Base version: v3.54.4-0.20240118083444-669aaf2dff2e (master)
Cannot suggest a release version.
Can only suggest a release version when compared against the most recent version of this major: v3.54.3.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (669aaf2) 67.42% compared to head (4257c72) 67.53%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #999      +/-   ##
==========================================
+ Coverage   67.42%   67.53%   +0.11%     
==========================================
  Files         252      252              
  Lines       24509    24509              
==========================================
+ Hits        16524    16551      +27     
+ Misses       7118     7095      -23     
+ Partials      867      863       -4     

Flag	Coverage Δ
	54.03% <ø> (+0.09%)	⬆️
go-1.20.x	67.49% <ø> (+0.07%)	⬆️
go-1.21.x	67.21% <ø> (-0.15%)	⬇️
integration	54.03% <ø> (+0.09%)	⬆️
macOS	38.81% <ø> (+<0.01%)	⬆️
ubuntu	38.82% <ø> (-0.04%)	⬇️
unit	38.93% <ø> (-0.01%)	⬇️
windows	38.90% <ø> (+0.02%)	⬆️
ydb-22.5	53.43% <ø> (-0.20%)	⬇️
ydb-23.1	53.57% <ø> (-0.10%)	⬇️
ydb-23.2	53.76% <ø> (+0.05%)	⬆️
ydb-23.3	53.67% <ø> (-0.20%)	⬇️

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