fix: direct map of fluentbit securitycontext options

[aslafy-z]

• Send whole fluentbit SecurityContext to fluentbit, configReloader and bufferVolumeMetrics containers

[pepov]

@aslafy-z perhaps set the whole spec.Security.SecurityContext directly into c.SecurityContext?

[aslafy-z]

I updated the PR, should I map it to buffervolumemetrics container too?

[pepov]

@aslafy-z I beleive yes, that would be symmetric to what we do with fluentd's bufferVolumeMetrics container as well