feat: get resource from store using backend and resource type instead of urn

[krtkvrm]

• [x] Add backend and resource type column
• [x] Change behaviour of bootstrap to update namespace table
• [x] Change behaviour in authz middleware to get resource from backend and resource type

[coveralls]

Pull Request Test Coverage Report for Build 2988035472

• 19 of 54 (35.19%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 62.526%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core/bootstrap/bootstrap.go	0	4	0.0%
internal/store/postgres/resource_repository.go	0	31	0.0%
<!--	Total:	19	54

Totals
Change from base Build 2960976846:	-0.2%
Covered Lines:	4540
Relevant Lines:	7261

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💛 - Coveralls