sentry-native: add option to switch crashpad dependency

[madebr]

Specify library name and version: sentry-native/all

Add option to swtich crashpad dependency between official upstream google crashpad and sentry's crashpad fork.

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

[conan-center-bot]

All green in build 2 (d48390bfb6e6078b9782958abc9542589f011f34):

• sentry-native/0.4.8@:
  All packages built successfully! (All logs)

• sentry-native/0.4.9@:
  All packages built successfully! (All logs)

• sentry-native/0.4.1@:
  All packages built successfully! (All logs)

• sentry-native/0.4.7@:
  All packages built successfully! (All logs)

• sentry-native/0.2.6@:
  All packages built successfully! (All logs)

[SSE4]

@prince-chrismc can you explain for me the relationship between these sentry-projects? (e.g. sentry, sentry-native, sentry-crashpad, sentry-breakpad, crashpad, breakpad, etc.)

[prince-chrismc]

Oh I am no expert! I'll do my best... There's a bunch of of OSS libraries for "stack trace error handling" (eg crashpad/breakpad)

The Sentry community (I like to romanticize it's because Conan did not exist) forked the projects to their build tree and added them as dependencies... over time they made minor changes so there's a slight difference between the original and the sentry- prefixed ones....

As a OSS purist you might be using the original crashpad for you application and do not want to mix the possibly different ABIs... so you replace the sentry version with the one you like

[madebr]

@prince-chrismc
I couldn't explain it better myself!
Thanks!