feat(php): reimagine fire and forget and development mode

[AndriiAndreiev]

🧰 Changes

• added "fire_and_forget" option in the PHP package that stands for switching from async to sync sending requests.
• "development_mode" option was reimagined and aligned with Node. It stands only for marking logs as "development".

In order to make our config options consistent throughout all languages and frameworks there are some changes need to be done.

In Node.js Package config we have 2 options:

• development: Defaults to false. When true, the log will be marked as a development log. This is great for separating staging or test data from data coming from customers.
• fireAndForget: Defaults to true. When false, the server will wait for the response from the metrics call. This will be slower, but the response is useful in debugging problems.

In PHP we have only one option that stands for both 2 Node options:

• development_mode: When disabled, development_mode will make all API requests asynchronously as well as silencing all possible errors in transit. This defaults to true, and you should change it to false before deploying your integration to production.

With this PR, PHP will have upgraded options, having the same logic as we have in Node.

🧬 QA & Testing

Fixed unit & integration tests