Commits on Nov 9, 2022

1. [PROF-6288] Enable -Werror to turn compiler warnings into errors in CI …

   **What does this PR do?**:
   
   This PR enables the `-Werror` compiler flag, which turns any
   compiler warnings into errors, when compiling profiler C code in CI.
   
   I also refreshed the `extconf.rb` for the
   `ddtrace_profiling_loader` to match the compiler flags from
   `ddtrace_profiling_native_extension` as well.
   
   **Motivation**:
   
   Most compiler warnings are quite useful at point out potential bugs,
   and we want to make sure our code is warning-free on all Ruby
   versions we support.
   
   **Additional Notes**:
   
   We don't enable `-Werror` always because we can't control what
   compiler our customers use. E.g. they may use a new compiler which
   introduces a new warning which we haven't seen and it doesn't
   make sense to "break" profiling for them just because of that.
   
   **How to test the change?**:
   
   Check that CI is still green.

   

   ivoanjo committed Nov 9, 2022
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