fix(vitest): discover named config files

[harshmathurx]

Current Behavior

The @nx/vitest inferred plugin only discovers vite.config.* and vitest.config.* files. That misses valid Vitest 4 migration patterns where one Nx project has multiple named Vitest configs such as vitest.unit.config.ts and vitest.integration.config.ts for different test groups.

Expected Behavior

Nx should discover named Vite/Vitest config files for the Vitest inferred plugin, so a workspace can expose separate targets/includes/excludes from the same Nx project without falling back to manual target wiring.

Related Issue(s)

Fixes #36438

This PR

Root cause: the discovery glob was restricted to the canonical vite.config.* / vitest.config.* filenames, so named config files were invisible before plugin target inference ran.

The fix is intentionally small:

• relax the Vitest config discovery glob to include named Vite/Vitest config files
• add a focused assertion covering the expanded glob behavior

Validation

Local checks run:

• git diff --check
• node glob intent smoke check for vitest.unit.config.ts, vitest.integration.config.mts, and standard vitest.config.ts

Local full dependency install was blocked by disk space in this checkout:

• pnpm install --frozen-lockfile failed with ERR_PNPM_ENOSPC
• NODE_OPTIONS=--max-old-space-size=4096 pnpm install --filter @nx/vitest --frozen-lockfile --ignore-scripts also failed with ERR_PNPM_ENOSPC

CI evidence currently visible on the PR:

• Socket Security: Project Report passed
• Socket Security: Pull Request Alerts passed
• Netlify deploys are pending maintainer approval

Risk / compatibility

This only broadens discovery to additional existing config-file names. Standard vite.config.* and vitest.config.* projects keep the same behavior; the main risk is surfacing additional Vitest targets that users intentionally named but Nx previously skipped.

cc @FrozenPandaz for the @nx/vitest inferred-plugin path.

[netlify]

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[netlify]

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[harshmathurx]

@FrozenPandaz could you take a look when you get a chance? This is the small @nx/vitest plugin discovery glob fix for #36438, matching the recent Vitest 4 workspace-config migration direction.