[TEST] refactor all tests to be consistent across different source codes

[angle943]

Description

Refactor all tests so that code can be consistent across different source codes.

• Where neo and OSD differs will be dictated by Cypress.env('SOURCE_CODE')
• I also removed unused custom commands and functions

BREAKING CHANGES:

• SECONDARY_ENGINE.url -> PATHS.SECONDARY_ENGINE
• Every test must use prepareTestSuite() function
• getRandomizedDatasourceName() is removed. Use DATASOURCE_NAME instead
• cy.deleteIndex() -> cy.osd.deleteIndex()
• cy.addDataSource() -> cy.osd.addDataSource()
• cy.deleteDataSourceByName() -> cy.osd.deleteDataSourceByName()
• cy.deleteAllDataSources() -> cy.osd.deleteAllDataSources()

Changelog

• skip

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[github-actions]

❌ Invalid Additional Prefix With Skip Entry Option

If your Changelog section includes the 'skip' entry option, it cannot also include other changelog entry prefixes. The option 'skip' must be alone when used. Please review your Changelog section again.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.71%. Comparing base (0da7752) to head (c7e7e75).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9319   +/-   ##
=======================================
  Coverage   61.70%   61.71%           
=======================================
  Files        3816     3816           
  Lines       91829    91829           
  Branches    14543    14543           
=======================================
+ Hits        56666    56668    +2     
+ Misses      31507    31506    -1     
+ Partials     3656     3655    -1     

Flag	Coverage Δ
Linux_1	28.99% <ø> (ø)
Linux_2	56.46% <ø> (ø)
Linux_3	39.18% <ø> (+<0.01%)	⬆️
Linux_4	28.90% <ø> (ø)
Windows_1	29.00% <ø> (ø)
Windows_2	56.41% <ø> (ø)
Windows_3	39.18% <ø> (ø)
Windows_4	28.90% <ø> (ø)

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