Actions: Diff-informed queries: phase 3 (non-trivial locations)

[d10c]

This PR enables diff-informed mode on queries that select a location other than dataflow source or sink. This entails adding a non-trivial location override that returns the locations that are actually selected.

Prior work includes PRs like #19663, #19759, and #19817. This PR uses the same patch script as those PRs to find candidate queries to convert to diff-enabled. This is the final step in mass-enabling diff-informed queries on all the languages.

Commit-by-commit reviewing is recommended.

• I have split the commits that add/modify tests from the ones that enable/disable diff-informed queries.
• If the commit modifies a .qll file, in the commit message I've included links to the queries that depend on that .qll for easier reviewing.
• Feel free to delegate parts of the review to others who may be more specialized in certain languages.

[Copilot]

Pull Request Overview

This PR enables diff-informed mode on security queries in the Actions language by adding location override methods to return the actual selected locations rather than just dataflow sources or sinks. This represents the final phase of mass-enabling diff-informed queries across all languages.

• Adds observeDiffInformedIncrementalMode(), getASelectedSourceLocation(), and getASelectedSinkLocation() methods to multiple security query configurations
• Incorporates existing "where clause" logic from corresponding Critical.ql files into the location selection methods
• Adds necessary imports for ControlChecks and other dependencies to support the new functionality

Reviewed Changes

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

Show a summary per file

File	Description
EnvVarInjectionQuery.qll	Adds diff-informed mode support with complex sink location logic for environment variable injection detection
EnvPathInjectionQuery.qll	Enables diff-informed mode with PATH environment variable specific location selection
CommandInjectionQuery.qll	Implements diff-informed mode for command injection detection with privileged context checks
CodeInjectionQuery.qll	Adds diff-informed support with logic for both code injection and cache poisoning scenarios
ArtifactPoisoningQuery.qll	Enables diff-informed mode for artifact poisoning detection with control check validation
ArgumentInjectionQuery.qll	Implements diff-informed mode for argument injection detection with event-based location selection