[AutoPR network/resource-manager] Improve Network's descriptions (#5584)

* Generated from 3b992f9396f9c0bc7e34b11696efcffafa92575a (#5297)

add network package-2019-06 to Go SDK

* Generated from 36ba645d97091ead19fa04d57595069d73491c7e (#5511)

Update PE/PLS

* Generated from ec578e180c4515be63046f0b0991d7b9547e657d (#5522)

Update description of "location" in serviceTags.json

* [AutoPR network/resource-manager] chore: jsonfmt network (#5514)

* Generated from 2c363ba11150b1894650db67b5d4a03166b95afd

chore: jsonfmt network

* Generated from 2c363ba11150b1894650db67b5d4a03166b95afd

chore: jsonfmt network

* Generated from 107aecb05da34dec7b766daa64c52c1cdaaf1635

Improve Network's descriptions by removing trailing space & adding period at the end

* Generated from a288e761cfacf73c7b4874f9c83505dd3e69f68f

Improve descriptions in Network specs