support template in the install section for brews

[cpanato]

Is your feature request related to a problem? Please describe.

support the templating in the install section for the brew

we generate binaries in the following format: binaryName_{{ .Os }}_{{ .Arch }}

and when creating the brew formula to users to install we would like to rename the binary in the install time to just binaryName

so in the brew syntax it is

bin.install "binaryName_{{ .Os }}_{{ .Arch }}" => "binaryName"

however when you add this in the gorelreaser config

...
brews:
...
  install: |
    bin.install "binaryName_{{ .Os }}_{{ .Arch }}" => "binaryName"

we receive an error

error=template: tmpl:16:33: executing "tmpl" at <.Os>: map has no entry for key "Os"

Describe the solution you'd like

the install section in the brew should accept template variables

Describe alternatives you've considered

n/a

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• I did search for other open and closed issues before opening this.

Code of Conduct

• I agree to follow this project's Code of Conduct

Additional context

thank you

[caarlos0]

@cpanato please check #3593

[cpanato]

@caarlos0 please let me know when you release it :)

[caarlos0]

@cpanato probably middle december, I plan to get nightlies for goreleaser oss as well, so you can use those meanwhile if you want