feat(asm): fix segmentation fault parsing JSON in Python2

[avara1986]

Description

Fix Python 2 error reading WAF rules

Checklist

• [x] Title must conform to conventional commit.
• [x] Add additional sections for feat and fix pull requests.
• [x] Ensure tests are passing for affected code.

Reviewer Checklist

• [ ] Title is accurate.
• [ ] Description motivates each change.
• [ ] No unnecessary changes were introduced in this PR.
• [ ] PR cannot be broken up into smaller PRs.
• [ ] Avoid breaking API changes unless absolutely necessary.
• [ ] Tests provided or description of manual testing performed is included in the code or PR.
• [ ] Release note has been added for fixes and features, or else changelog/no-changelog label added.
• [ ] All relevant GitHub issues are correctly linked.
• [ ] Backports are identified and tagged with Mergifyio.
• [ ] Add to milestone.

[codecov-commenter]

Codecov Report

Merging #4082 (9ddcb9d) into 1.x (055110a) will increase coverage by 0.02%. The diff coverage is 80.86%.

@@            Coverage Diff             @@
##              1.x    #4082      +/-   ##
==========================================
+ Coverage   78.90%   78.93%   +0.02%     
==========================================
  Files         720      720              
  Lines       57046    57239     +193     
==========================================
+ Hits        45013    45181     +168     
- Misses      12033    12058      +25     

Impacted Files	Coverage Δ
ddtrace/contrib/flask/patch.py	0.00% <0.00%> (ø)
tests/contrib/flask/test_flask_appsec.py	0.00% <0.00%> (ø)
tests/contrib/flask/test_flask_snapshot.py	0.00% <0.00%> (ø)
tests/integration/test_integration_snapshots.py	0.00% <0.00%> (ø)
tests/telemetry/test_telemetry.py	0.00% <0.00%> (ø)
tests/telemetry/test_writer.py	0.00% <ø> (ø)
ddtrace/internal/module.py	78.87% <66.66%> (-0.06%)	:arrow_down:
ddtrace/contrib/django/utils.py	90.52% <88.23%> (+0.25%)	:arrow_up:
ddtrace/internal/sampling.py	92.81% <88.67%> (+1.26%)	:arrow_up:
ddtrace/constants.py	100.00% <100.00%> (ø)
... and 11 more

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[avara1986]

@Mergifyio backport 0.x 0.61 1.3 1.4

[mergify[bot]]

backport 0.x 0.61 1.3 1.4

✅ Backports have been created

• #4094 feat(asm): fix segmentation fault parsing JSON in Python2 (backport #4082) has been created for branch 0.x
• #4095 feat(asm): fix segmentation fault parsing JSON in Python2 (backport #4082) has been created for branch 0.61
• #4096 feat(asm): fix segmentation fault parsing JSON in Python2 (backport #4082) has been created for branch 1.3
• #4097 feat(asm): fix segmentation fault parsing JSON in Python2 (backport #4082) has been created for branch 1.4