fix: AtomicI64, AtomicU64 for xtensa arch

[brunobrolesi]

Fixes #

I'm working on a personal project that tries to add observability to an mqtt system with ESP32 microcontrollers. When I tried to use the open telemetry crate to export my program's traces, I encountered the following build error:

Changes

After doing some analysis on the subject, I came across the following PR that had the same problem, but for other architectures. Based on the discussion of the PR, I made the changes for the architecture I am using and was able to use the stdout exporter, as can be seen in the image below:

One thing to note, this change only allowed me to use the stout exporter, the others had problems due to a compilation error related to the dependencies hyper and socket 2, this problem can be seen in the issues below:

• hyper
• socket2

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: brunobrolesi / name: Bruno Brolesi (d6894e4, 2fca21c, e629842, 52ff82a)
• ✅ login: cijothomas / name: Cijo Thomas (e69b763)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.7%. Comparing base (68c9133) to head (e69b763).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2773   +/-   ##
=====================================
  Coverage   79.7%   79.7%           
=====================================
  Files        123     123           
  Lines      23115   23115           
=====================================
+ Hits       18426   18427    +1     
+ Misses      4689    4688    -1     

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[cijothomas]

@brunobrolesi Thanks! Can you check if this is only place where Atomics were used? It's okay to do it in a follow up, if you are okay with that. (Trying to make sure we do support extra architectures consistently across repo (wherever feasible))