Add new `compress_paths=false` generation flag using embedded query objects.

[wenovus]

Main files to review:

• app/ygnmi/cmd/generator/generator.go
  • Add new generation option compress_paths=false.
• pathgen/pathgen.go
  • Add Extra generators for fields and object initializations in order to generate embedded query objects.
• pathgen/gnmigen.go
  • Refactored templates to re-use query object creation.
  • Added Generator plugins for field and object initializations for embedding uncompressed query objects.
• ygnmi/...
  • Add a couple more Query fields (isCompressedSchema and isListContainer) to differentiate behaviour during unmarshalling.
  • Added uncompressed tests guarded by Go 1.21 build constraint.

[coveralls]

Pull Request Test Coverage Report for Build 5683677442

• 123 of 202 (60.89%) changed or added relevant lines in 6 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-2.0%) to 82.402%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pathgen/pathgen.go	76	96	79.17%
pathgen/gnmigen.go	19	78	24.36%
<!--	Total:	123	202	60.89%	-->

Totals
Change from base Build 5674718906:	-2.0%
Covered Lines:	1859
Relevant Lines:	2256

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💛 - Coveralls