Merge pull request #3066 in SNORT/snort3 from ~ABHPAL/snort3:efd to master

Merge pull request #3066 in SNORT/snort3 from ~ABHPAL/snort3:efd to master

Squashed commit of the following:

commit a7546af7ffbfe398895275113b8647ebc1f8ca4d
Author: abhpal <abhpal@cisco.com>
Date:   Tue Sep 21 14:45:08 2021 +0530

    latency: adding configuration for implicit enable

commit 56dd75b7fc2ea8b87a58fbd7745ffbf35a977c04
Author: abhpal <abhpal@cisco.com>
Date:   Tue Sep 21 14:43:41 2021 +0530

    snort_config: adding api for enabling latency module

commit cd88ec50a401f9badd105ed22fe62739c44496de
Author: abhpal <abhpal@cisco.com>
Date:   Thu Sep 16 20:09:57 2021 +0530

    flow: add total flow latency to flowstats