refactor: rename exception replay enablement variable

[P403n1x87]

We rename the exception replay enablement variable from DD_EXCEPTION_DEBUGGING_ENABLED to DD_EXCEPTION_REPLAY_ENABLED

Checklist

• [ ] The PR description includes an overview of the change
• [ ] The PR description articulates the motivation for the change
• [ ] The change includes tests OR the PR description describes a testing strategy
• [ ] The PR description notes risks associated with the change, if any
• [ ] Newly-added code is easy to change
• [ ] The change follows the library release note guidelines
• [ ] The change includes or references documentation updates if necessary
• [ ] Backport labels are set (if applicable)

Reviewer Checklist

• [ ] Title is accurate
• [ ] All changes are related to the pull request's stated goal
• [ ] Avoids breaking API changes
• [ ] Testing strategy adequately addresses listed risks
• [ ] Newly-added code is easy to change
• [ ] Release note makes sense to a user of the library
• [ ] If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• [ ] Backport labels are set in a manner that is consistent with the release branch maintenance policy

[P403n1x87]

We need to upgrade envier to merge this

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 10.81081% with 33 lines in your changes missing coverage. Please review.

Project coverage is 10.54%. Comparing base (c728c68) to head (08b842c). Report is 43 commits behind head on main.

Files	Patch %	Lines
tests/debugging/exception/test_replay.py	0.00%	23 Missing :warning:
ddtrace/settings/exception_replay.py	0.00%	3 Missing :warning:
ddtrace/internal/telemetry/writer.py	0.00%	2 Missing :warning:
tests/debugging/mocking.py	0.00%	2 Missing :warning:
ddtrace/bootstrap/preload.py	66.66%	1 Missing :warning:
ddtrace/internal/telemetry/constants.py	0.00%	1 Missing :warning:
tests/telemetry/test_writer.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #9708       +/-   ##
===========================================
- Coverage   74.30%   10.54%   -63.76%     
===========================================
  Files        1398     1368       -30     
  Lines      129930   127942     -1988     
===========================================
- Hits        96541    13494    -83047     
- Misses      33389   114448    +81059     

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