Beats version 8.10.3

Affecting all Beats - syslog processor - Fix the ability to use when conditions on the processor. 36762

Packetbeat

Filebeat

Update mito CEL extension library to v1.6.0. 36651
Re-use buffers to optimise memory allocation in fingerprint mode of filestream 36736

Packetbeat

Improve efficiency of sniffers by deduplicating interface configurations. 36574 36576