ci: replace superlinter with megalinter

[catthehacker]

• replaced https://github.com/github/super-linter with https://github.com/megalinter/megalinter (megalinter is maintained better than superlinter)
• pass context to Executor for gitClone, this was recommended by contextcheck linter but later on I noticed it's a required
  fix anyway for logging, also pass context to Docker engine version check func
• fix .goreleaser.yml, in-editor schema validation (and schema linter) screams about ints being ints
• correct dependabot.yml quotes
• move CGO_ENABLED to global env
• remove unnecessary nolint comments

[codecov]

Codecov Report

Merging #923 (f0a2e36) into master (0f04942) will increase coverage by 7.55%.
The diff coverage is 63.18%.

@@            Coverage Diff             @@
##           master     #923      +/-   ##
==========================================
+ Coverage   49.27%   56.82%   +7.55%     
==========================================
  Files          23       28       +5     
  Lines        2401     4160    +1759     
==========================================
+ Hits         1183     2364    +1181     
- Misses       1090     1589     +499     
- Partials      128      207      +79     

Impacted Files	Coverage Δ
pkg/common/executor.go	46.90% <0.00%> (+2.03%)	⬆️
pkg/common/job_error.go	0.00% <0.00%> (ø)
pkg/common/outbound_ip.go	0.00% <0.00%> (ø)
pkg/common/testflag.go	0.00% <0.00%> (ø)
pkg/container/docker_volume.go	0.00% <0.00%> (ø)
pkg/model/action.go	0.00% <ø> (ø)
pkg/container/docker_run.go	5.54% <14.15%> (+3.61%)	⬆️
pkg/common/git.go	49.82% <31.81%> (-9.97%)	⬇️
pkg/runner/logger.go	65.43% <37.50%> (+1.28%)	⬆️
pkg/container/docker_auth.go	45.00% <45.00%> (ø)
... and 35 more

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[cplee]

Thanks for the quick fix @catthehacker