Feature: rename envs to dynenvs

[laurentsimon]

The builder takes an input envs to pass environment variables generated at build time (e.g., ldflags).
Static env variables are declared in the .slsa-goreleaser.yml file.

Shall we rename envs to dynenvs/dyn_envs/dynamic_envs?

[laurentsimon]

@asraa @joshuagl any feedback on this one?

Context: env variables are defined in the config file by a user. But env variables that need to be dynamically resolved at compile time (LDFLAGS, e.g. to retrieve the Git version) need to use this input:

uses: slsa-framework/slsa-github-generator-go/.github/workflows/builder.yml@main
    with:
      # Optional: only needed if using ldflags.
      env: "VERSION_LDFLAGS:${{needs.args.outputs.ldflags}}"

I''m suggesting we use dynenv: "VERSION_LDFLAGS:${{needs.args.outputs.ldflags}}" or something to this effect instead.

Any preference on the name?

[joshuagl]

I like dynamic_env, generated_env or evaluated_env. My preference is that we indicate separate words (though I am open to camel case, rather than snake case) and that we use full words. I like "evaluated" and "generated" as "dynamic" may imply that it can change on each invocation of the workflow.