fluentbit: Add support for hot_reload.timeout and hot_reload.ensure_thread_safety in FluentBitConfig

[devodev]

Is your feature request related to a problem? Please describe.

I would like to be able to configure the hot reload timeout.
This configuration defaults to unset and causes unbounded hot reloads, which can cause inifinite wait on output tasks that don't cooperate.

Example stuck hot reload log output:

[2026/04/17 13:17:16.210961315] [ info[] [engine] pending chunk count: memory=31, filesystem=0; grace_timer=1331
[2026/04/17 13:17:16.210981756] [ info[] [task] tail/tail.0 has 0 pending task(s):
[2026/04/17 13:17:16.210992065] [ info[] [task] emitter/emitter_for_rewrite_tag.0 has 29 pending task(s):
[2026/04/17 13:17:16.211000726] [ info[] [task]   task_id=47 still running on route(s): null/null.1 http/http.2 http/http.3 http/http.4 http/http.5 http/http.6 http/http.7 http/http.8 http/http.9 
[2026/04/17 13:17:16.211007066] [ info[] [task]   task_id=77 still running on route(s): null/null.1 http/http.2 http/http.3 http/http.4 http/http.5 http/http.6 http/http.7 http/http.8 http/http.9 
[2026/04/17 13:17:16.211015446] [ info[] [task]   task_id=117 still running on route(s): null/null.1 http/http.2 http/http.3 http/http.4 http/http.5 http/http.6 http/http.7 http/http.8 http/http.9 
[2026/04/17 13:17:16.211024426] [ info[] [task]   task_id=145 still running on route(s): null/null.1 http/http.2 http/http.3 http/http.4 http/http.5 http/http.6 http/http.7 http/http.8 http/http.9 
[2026/04/17 13:17:16.211032136] [ info[] [task]   task_id=48 still running on route(s): http/http.0 null/null.1 http/http.2 http/http.3 http/http.4 
...

Describe the solution you'd like

Add hotReloadTimeout and hotReloadEnsureThreadSafety fields to FluentBitConfig.service and ClusterFluentBitConfig.service.

Additional context

No response