remove refs to twitter

[bryevdv]

This PR removes references to Twitter in the docs, and also makes a few other small updates e.g. to note that some of the bindings projects are currently archived. It also simplifies the devguide to remove the LinkedIn reference as well, which we use even far less than twitter.

• issues: fixes Remove twitter icon link from docs and other properties #13772
• release document entry (if new feature or API change)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.65%. Comparing base (fd9f035) to head (48014b8).

Additional details and impacted files

@@              Coverage Diff               @@
##           branch-3.5   #13775      +/-   ##
==============================================
- Coverage       92.65%   92.65%   -0.01%     
==============================================
  Files             327      326       -1     
  Lines           20735    20733       -2     
==============================================
- Hits            19213    19210       -3     
- Misses           1522     1523       +1     

[pavithraes]

Thank you!