perf: Improve performance of ipv4 address formatting

[bnbajwa]

SDB-8486

[bnbajwa]

unit tests already exist in Endpoint.ut.test

Performance benchmark:

NAME                                                   COUNT       MIN       %50       %95       %99     %99.9    %99.99
------------------------------------------------------------------------------------------------------------------------
format_ipv4_endpoint_libc                           25081856     0.092     0.117     0.127     0.182     0.251     0.307
format_ipv4_endpoint                               165123072     0.014     0.017     0.019     0.021     0.027     0.033

So new formatter is ~7 times faster