troubleshooting: add configurable crash reporting with crashpad

This commit adds a basic crash-report system that can be optionally
configured to automatically send minidump crash-reports in addition
to product versions and a platform description including the OS
name and CPU architecture. Reports can be received at a configured
REST endpoint(POST). This endpoint URL can be configured using
a CMake variable `CRASH_REPORT_URL` which defaults to
"http://localhost:8080/submit".

- Introduces a new CMake option `ENABLE_CRASHREPORTS`, defaulting
  to OFF. This allows developers to enable crash reporting features
  at build time selectively. We also define a new macro with the
  same name to expose the state to QML in order to hide the UI
  components if needed.

- Implemented conditional inclusion of crashpad dependencies using
  `ENABLE_CRASHREPORTS`. If set, `ENABLE_CRASHPAD` is also enabled
  (other crash reporters exist and we may want to use them).

- 2 new application settings are added: `EnableCrashReporting` and
  `EnableAutomaticCrashReporting`. Default settings make it so
  crash-reports are generated but not automatically sent. With this
  default configuration, users will be prompted upon application
  start to confirm the report upload. Additionally, users may
  opt-in in order to have reports sent automatically at crash-time.

Gitlab: #1454
Change-Id: I53edab2dae210240a99272479381695fce1e221b