Remove disable_combine_sarif_files feature flag

[koesie10]

This removes the disable_combine_sarif_files feature flag which is currently fully enabled.

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Confirm the readme has been updated if necessary.
• Confirm the changelog has been updated if necessary.

[Copilot]

Pull Request Overview

This PR removes the disable_combine_sarif_files feature flag which is currently fully enabled and no longer needed. The change simplifies the codebase by removing feature flag checks and directly applying the behavior that was previously controlled by the flag.

• Removes the DisableCombineSarifFiles feature flag enum value and configuration
• Updates function signatures to remove the features parameter from SARIF file combination logic
• Simplifies test cases by removing feature flag-related test setup and scenarios

Reviewed Changes

Copilot reviewed 6 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/upload-lib.ts	Removes feature flag parameter from functions and simplifies SARIF file combination logic
src/upload-lib.test.ts	Updates test cases to remove feature flag dependencies and removes redundant test
src/feature-flags.ts	Removes the DisableCombineSarifFiles enum value and configuration
lib/upload-lib.test.js	Generated JavaScript equivalent of test file changes
lib/upload-lib.js	Generated JavaScript equivalent of main implementation changes
lib/feature-flags.js	Generated JavaScript equivalent of feature flag removal

[koesie10]

For the failing tests, it's probably easiest to wait for CLI 2.16.6 support to be dropped (which I suggested here).

[mbg]

The changes make sense to me, thank you!