Migrate from Swagger v2 to OpenAPI v3

[nscuro]

Description

• Migrates from Swagger Core v1.x (OpenAPI 2.0) to Swagger Core v2.x (OpenAPI 3.0)
• Adds declaration for multiple securitySchemes (API key and Bearer), where the previous solution only supported one (API key)
• Removes reliance on Alpine to provide a Swagger servlet, instead use a dedicated JAX-RS resource for it

BREAKING CHANGES:

• Support for OpenAPI 2.0 is dropped
• OpenAPI spec is now exposed via /api/openapi.json and /api/openapi.yaml - /api/swagger.json no longer works

Addressed Issue

Relates to #840

Additional Details

Depends on stevespringett/Alpine#567

Checklist

• I have read and understand the contributing guidelines
• This PR fixes a defect, and I have provided tests to verify that the fix is effective
• This PR implements an enhancement, and I have provided tests to verify that it works as intended
• This PR introduces changes to the database model, and I have added corresponding update logic
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.01% (target: -1.00%)	❌ 0.00% (target: 70.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (c04d4df)	21640	16390	75.74%
Head commit (0c7a7ff)	21642 (+2)	16390 (+0)	75.73% (-0.01%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#3726)	2	0	0.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

See your quality gate settings    Change summary preferences

_{Codacy will stop sending the deprecated coverage status from June 5th, 2024. Learn more}