Gomodule implementation should not depend on specific git provider

[emilien-puget]

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fetching available versions of go module should be done using the go executable and not the api of the git provider. This would allow renovate to handle any and all go module hosted on any git provider

For reference the implementation done by dependabot https://github.com/dependabot/dependabot-core/blob/7da4bdd9dad12b153c27ba6dac9d6f559bc8e4c7/go_modules/lib/dependabot/go_modules/package/package_details_fetcher.rb#L71.

Other discussions such as #32125 and #32105 are indirectly related to this one as the current implementation tries too much to mimic what is already done by the go executable itself