Replace sentry/sdk by sentry/sentry 3.17

[nicolas-grekas]

Same as #693, but updated to 3.17 thanks to getsentry/sentry-php#1504

[cleptric]

Holding off on this for the moment. We don't need to fix what is not broken.
We'll revisit this in the next major of the base SDK.

To go into more detail, I'm not fond of removing dependencies from users' installations and now relying upon that https://github.com/php-http/discovery is properly configured on their end.
This might cause interruptions I'm currently unwilling to offload to our users.

[nicolas-grekas]

The thing that is "broken" is sentry/sdk, which forces a specific client implementation, whereas php-http/discovery already does the job. It's super weird that the recommended solution is to "replace" the SDK.

Linking to #246 for reference.

[nicolas-grekas]

Even the README of this package suggests the "replace". This is something that's solved now, let's clear this up 🙏

[cleptric]

The thing that is "broken" is sentry/sdk, which forces a specific client implementation, whereas php-http/discovery already does the job.

We already ran into many issues due to php-http/discovery, and right now, I stand by my decision to postpone any further changes in this regard until the next major version.

This is again in strong alignment with our SDK philosophy: https://develop.sentry.dev/sdk/philosophy/#degrade-gracefully.

I wasn't aware of the mentioned passage in our README, I can take a look if this still applies.

[nicolas-grekas]

Let's go for a v2v5?

[cleptric]

v4 of https://github.com/getsentry/sentry-php 😄