remove payment_behavior - it's breaking subscription.modify

[nora-codecov]

Purpose/Motivation

Stripe errors are popping up in logs with this message StripeError raised: When payment_behavioris set topending_if_incomplete, you can only pass supported params. metadata is not supported. See https://stripe.com/docs/billing/subscriptions/pending-updates-reference#supported-attributes for more details.

There are several conflicting params, I'll have to sort them out later, for now removing this param from the .modify() call should fix the problem

Links to relevant tickets

codecov/engineering-team#2407
https://docs.stripe.com/billing/subscriptions/pending-updates-reference

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.25%. Comparing base (b2d3967) to head (e8cfc99).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##               main       #839   +/-   ##
===========================================
  Coverage   96.25000   96.25000           
===========================================
  Files           814        814           
  Lines         18656      18656           
===========================================
  Hits          17958      17958           
  Misses          698        698           

Flag	Coverage Δ
unit	92.51% <ø> (ø)
unit-latest-uploader	92.51% <ø> (ø)

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[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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