feat: Application specific tests for Dex

[SandhyaRavi2403]

What problem does this PR solve?:

Which issue(s) does this PR fix?:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Checklist

• If the PR adds a version bump, ensure there is no breaking change in Licensing model (or NA).
• If a chart is changed or app configuration is significantly changed, the chart version is correctly incremented (so that apps are not automatically upgraded from a previous version of DKP).

[coveralls]

Pull Request Test Coverage Report for Build 12238621205

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 51.703%

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Totals
Change from base Build 12190303423:	0.0%
Covered Lines:	167
Relevant Lines:	323

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💛 - Coveralls

[SandhyaRavi2403]

@lukeogg
I have replicated the tests for dex based on the existing one's. I could see the installation is failing
s: "helm release not ready yet",
Could you suggest on if anything needs to be added. Thanks

[lukeogg]

I'll slack you some ideas on what to do next. Looks like Dex, needs a valid certificate.

[github-actions]

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