NH-89983: remove doc/ from lambda build; fix logging

[xuan-cao-swi]

Description

Test (if applicable)

[cheempz]

Another note from testing--if the function handler code had something like:

require 'foo'
# require 'bar'
##require 'baz'

we should not try to preload the commented out libraries.

[xuan-cao-swi]

The current regex scan will ignore the comment, for example

irb(main):002:0> File.read("sample_lambda_file.rb")
=> "require 'foo'\n# require 'bar'\n##require 'baz'\n"
irb(main):003:0> File.read("sample_lambda_file.rb").scan(/^\s*require\s+['"]([^'"]+)['"]/).flatten
=> ["foo"] # only the library name (e.g. foo) inside array will be called with require

[cheempz]

LGTM! added a commit to fix the docs dir removal--ran through the adhoc testing today with updated layer and looks good, let's get this PR in and we can talk next week on next steps for a GA release @xuan-cao-swi :)