inspectConfig added to jobTrigger (GoogleCloudPlatform#7677)

* inspectConfig added to jobTrigger

* Test Precheck Updated

* fields added to test

* removed deprecated attributes contentOptions and detectionRules

* customInfoTypes tests added covering all attributes

* tabs removed from erb file and double space added

* removed required from mentioned attributes

* minor changes

* Additional test for Exclusion Rule added

* removing required from hotwordRegex and pattern

* Spacing changed

* immutable removed from customInfoType attributes

* required removed from proximity

* required removed from proximity and likelihoodAdjustment in rules

* Tests modified and new cases added

* added remaining 4 attr to test config

* minor changes