chore(crashtracker): add process_tags

[dubloom]

This PR implements this RFC for crashtracking.

Add process_tags to crashtracking payload

Testing

• Check that process tags are not included if deactivated
• Check the right process tags are set in the payload when activated

[github-actions]

CODEOWNERS have been resolved as:

ddtrace/internal/core/crashtracking.py                                  @DataDog/apm-core-python
tests/internal/crashtracker/test_crashtracker.py                        @DataDog/apm-core-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 243 ± 5 ms.

The average import time from base is: 241 ± 4 ms.

The import time difference between this PR and base is: 1.5 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 1.716 ms (0.71%)

ddtrace.bootstrap.sitecustomize 1.044 ms (0.43%)

ddtrace.bootstrap.preload 1.044 ms (0.43%)

ddtrace.internal.remoteconfig.client 0.552 ms (0.23%)

ddtrace 0.672 ms (0.28%)

ddtrace.internal._unpatched 0.025 ms (0.01%)

json 0.025 ms (0.01%)

json.decoder 0.025 ms (0.01%)

re 0.025 ms (0.01%)

enum 0.025 ms (0.01%)

types 0.025 ms (0.01%)