Enhancement: Adopt JSONPath for KubeSec Parser

[hanyanghu]

To pinpoint locations of entities in a YAML file, JSONPath is the standard query language for JSON, but it can also be used for YAML. With JSONPath, many tools support fetching line numbers automatically, such as yq (https://mikefarah.gitbook.io/yq/operators/line).

Currently, KubeSec identifies entities using a custom expression language (e.g., "metadata.doc.yaml.6"). Adopt JSONPath in the KubeSec parser. Then, each static analysis alert can be identified by one (in most case) or many JSONPaths. Use yq to fetch line numbers using Python subprocess module.

Introduction material:
https://support.smartbear.com/alertsite/docs/monitors/api/endpoint/jsonpath.html

JSONPath playground:
https://jsonpath.com/

[hanyanghu]

Assignee: @shazibulislam

[shazibulislam]

Addressed the issue in pull request #15