Add option attach_stacktrace

[EvgenPervenenko]

Description
When enabled option, for example, attach_stacktrace, stack traces are automatically attached to all logged messages. While stack traces are always included with exceptions, enabling this option also attaches stack traces to regular messages(or for SENTRY_LEVEL_FATAL messages only). This feature ensures that stack traces are visible alongside all log messages, providing comprehensive context for debugging and issue resolution.

Use case
Capturing Steps to Reproduce Issues: For events logged from client functions, different stack traces can help identify the exact steps that led to the issue, making it easier to reproduce and resolve.

Grouping in Sentry: Sentry groups events differently depending on whether they include stack traces. As a result, enabling or disabling this flag for certain events will lead to new groups being formed.

Interface Changes
add function

sentry_options_set_attach_stacktrace

using:

sentry_options_t *options = sentry_options_new();
sentry_options_set_attach_stacktrace(options, 1);