Sentry update + TOML configuration

[kerberjg]

The following PR updates the implementation of sentry-native (now built against v0.14.2) via the built-in CrashHandler, and implements support for full TOML configuration (config.toml):

[sentry]
release = "homescreen-1.0.0"
env = "production"
attachments = [
    "/path/to/crash.log",
    "/path/to/config.toml"
]
[sentry.tags]
platform = "linux"
device = "ivi"

DSN URL is specified via SENTRY_DSN environment variable.

As such, any support for tags/release/etc configuration via env vars or CMake defines has been removed and superseded by the above.

TODO:

• Land Implement --override-repo for branch/ref override for cloning meta-flutter/workspace-automation#176
• Land Bump sentry-native to v0.14.2 meta-flutter/workspace-automation#167
• Land Implements setup-workspace GitHub Action + caching meta-flutter/workspace-automation#172
• Update CI to include BUILD_CRASH_HANDLER=ON