resolve Ruby 4 warnings, closes #2008

[ajwann]

Hey @arielvalentin! I saw #2008 and thought it was a good opportunity for a first time contributor.

Here's a summary of changes:

• Fixed Ruby-4 related warnings related to the following gems:
  • Ostruct:
    • Warning: warning: ostruct used to be loaded from the standard library, but is not part of the default gems since Ruby 4.0.0..
    • Resolution: added to the gem spec of any gem which relied on ostruct.
  • CGI:
    • Warning: warning: CGI library is removed from Ruby 4.0. Please use cgi/escape instead for CGI.escape and CGI.unescape features.
    • Resolution: confirmed we’re only using escape and unescape, changed require statement in several gems text_map_propagator.rb file from cgi to cgi/escape.
  • Logger:
    • Warning: warning: logger used to be loaded from the standard library, but is not part of the default gems since Ruby 4.0.0
    • Resolution: add logger to gemspec for several gems.
• Tested with Ruby 4.0.1 and also with 3.3.5 for backwards compatibility

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: ajwann / name: Adam Wanninger (8db251b)

[ajwann]

Not every gemspec needed the ostruct dependency added, but for the ones that did, I placed it in alphabetical order to keep things tidy.