[scaffolding-ruby] bundler deprecated warnings

[jritchie-nullable]

Running build within hab studio results in several deprecation notices with the current bundler. The functionality of these flags I do not believe is being removed. Under Habitat the reasoning for the deprecation does not apply if I understand correctly.

Workarounds do exist:
BUNDLE_SILENCE_DEPRECATIONS is an environment variable that may be applied to silence the warnings - however this would hide future deprecations that need to be addressed.

BUNDLE_DEPLOYMENT=1
BUNDLE_PATH="..."
BUNDLE_SHEBANG="..."
BUNDLE_WITHOUT="..."

Might be options as an alternative to executing the 'bundle config set' route.

Current deprecated warning list

[DEPRECATED] The --deployment flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set --local deployment 'true', and stop using this flag
[DEPRECATED] The --path flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set --local path '/hab/pkgs/jritchie-null-test/minimal/0.1.0/20211102161242/app/vendor/bundle', and stop using this flag
[DEPRECATED] The --shebang flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set --local shebang '/hab/pkgs/core/ruby/3.0.2/20211019144421/bin/ruby', and stop using this flag
[DEPRECATED] The --without flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set --local without 'development:test', and stop using this flag