fix(release): align VersionDataEntry dependency types with VersionActions to allow null values

[Tusharkhadde]

Fixes #35913

Current Behavior

VersionDataEntry.dependentProjects defines dependencyCollection and
rawVersionSpec as string, while VersionActions.readCurrentVersionOfDependency
returns string | null for both fields.

This schema mismatch can cause runtime validation failures when a custom
VersionActions implementation returns null for either property.

Expected Behavior

VersionDataEntry should align with the VersionActions contract, allowing
both dependencyCollection and rawVersionSpec to be string | null.

Changes

• Updated packages/nx/src/command-line/release/utils/shared.ts
  • Changed dependencyCollection from string to string | null
  • Changed rawVersionSpec from string to string | null

This ensures consistency between VersionDataEntry and the VersionActions
API, preventing schema validation mismatches at runtime.

Closes #35913

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[netlify]

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🔨 Latest commit	a80ec28