Migrate argv to span first

[sentrivana]

See parent issue for details.

argv defines a global event processor. We should determine if we want that data on v2 spans and if so, port it.

getsentry/sentry-conventions#327

https://github.com/getsentry/sentry-python/blob/master/sentry_sdk/integrations/argv.py

[linear-code]

PY-2300

[sentrivana]

Opened getsentry/sentry-conventions#327. If accepted, I'll make a PR to set process.command_args on segments.