Clean golangci-lint configuration

[ldez]

• govet: the option shadow doesn't exist
• disable: the deprecated linters (level 2 of the deprecation) are removed from the enable-all feat: log an error when using previously deprecated linters golangci/golangci-lint#4681

tips:

golangci-lint config verify --config golangci.yml

[ldemailly]

Thanks a lot for cleaning up our config! greatly appreciated! of note, just filled #38

But I tested on fortio/fortio's and it worked

WARN [config_reader] The configuration option `linters.errcheck.ignore` is deprecated, please use `linters.errcheck.exclude-functions`. 
WARN The linter 'execinquery' is deprecated (since v1.58.0) due to: The repository of the linter has been archived by the owner.  
WARN [linters_context] copyloopvar: this linter is disabled because the Go version (1.19) of your project is lower than Go 1.22 
WARN [linters_context] intrange: this linter is disabled because the Go version (1.19) of your project is lower than Go 1.22 

I suppose I should maybe also eventually remove execinquery but for now despite archive I think it's fine

Thanks again