fix(testing): resolve full paths to vite configs for vitest

[barbados-clemens]

Current Behavior

vite/vitest could infer invalid paths for configs with custom config files

Expected Behavior

vite uses the correct config file when passed in

Related Issue(s)

Fixes #16985
TODO:

• test on windows

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 2, 2023 7:57pm

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✅ Successfully ran 8 targets

• nx affected -t e2e-macos --parallel=1 --base=a0b41eba3ea8d0df20380a870e149f9cbeba71b3 --head=0d00e2f3b72dc56d84dfccf8594c31940c2a3783
• nx affected --target=e2e --base=a0b41eba3ea8d0df20380a870e149f9cbeba71b3 --head=0d00e2f3b72dc56d84dfccf8594c31940c2a3783 --parallel=1
• nx affected --target=test --base=a0b41eba3ea8d0df20380a870e149f9cbeba71b3 --head=0d00e2f3b72dc56d84dfccf8594c31940c2a3783 --parallel=1
• nx affected --target=build --base=a0b41eba3ea8d0df20380a870e149f9cbeba71b3 --head=0d00e2f3b72dc56d84dfccf8594c31940c2a3783 --parallel=3
• nx run-many -t check-imports check-commit check-lock-files depcheck check-codeowners documentation --parallel=1 --no-dte
• nx affected --target=lint --base=a0b41eba3ea8d0df20380a870e149f9cbeba71b3 --head=0d00e2f3b72dc56d84dfccf8594c31940c2a3783 --parallel=3
• nx-cloud record -- nx format:check --base=a0b41eba3ea8d0df20380a870e149f9cbeba71b3 --head=0d00e2f3b72dc56d84dfccf8594c31940c2a3783
• nx documentation --no-dte

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