feat: add feature flag to arbitrary transactions

[Nortsova]

Description

Add ARBITRARY_TXS_ACTION feature flag to disable arbitrary transactions on prod

Testing

Step 1. Ensure that you have a QA or local API keys for POSTHOG
Step 2. Open any motion
Step 3. Verify that you can see Arbitrary transactions in Action Type list:

Step 4. Navigate to src/context/FeatureFlagsContext/FeatureFlagsContextProvider.tsx and update like 46 with:

{
        isEnabled: false,
        isLoading: false,
      }

Step 5. Ensure that there is no "Arbitrary transactions" in Motion Action Type list:

Resolves #3797

[jakubcolony]

All good here, I tested it by disabling the flag in Posthog.

Flag enabled:

Flag disabled:

Nice job! 👍

[mmioana]

Nice work and thanks for picking up this issue @Nortsova 🤩

The Arbitrary transaction shows up in the list

Changing the feature flag config

The Arbitrary transaction no longer shows up in the list

In Posthog all environments have the feature flag set-up 💪

🌟

[rumzledz]

And for @Nortsova's next magic trick, making the Arbitrary Transaction option disappear from the Action types list! 🎩 🪄

Before editing our feature flags

Feature flag edit

After editing our feature flags