feat(medusa-payment-paypal,medusa-payment-stripe): speed up unit tests in CI (#6806)

* chore: shard unit tests

* chore: move paypal and stripe to swc

* chore: update actions

* chore: refactor http paypal client

* chore: added changeset

* chore: remove medusa changes

.changeset/poor-kiwis-rush.md

@@ -0,0 +1,6 @@
+---
+"medusa-payment-paypal": patch
+"medusa-payment-stripe": patch
+---
+
+feat(medusa-payment-paypal,medusa-payment-stripe): speed up unit tests in CI