Address comments from review

- Change env var name for `MlPoweredQueriesEnabled`
- Throw error if minimumVersion is specified, but CodeQL argument is not
  supplied.
- Fix failing tests. Note that I removed a config-utils test because it
  is no longer relevant since we handle codeql minimum versions in the
  `getValue` function.

lib/feature-flags.js

@@ -36,7 +36,7 @@ exports.featureFlagConfig = {
         minimumVersion: undefined,
     },
     [FeatureFlag.MlPoweredQueriesEnabled]: {
-        envVar: "CODEQL_VERSION_ML_POWERED_QUERIES",
+        envVar: "CODEQL_ML_POWERED_QUERIES",
         minimumVersion: "2.7.5",
     },
     [FeatureFlag.TrapCachingEnabled]: {
@@ -59,7 +59,22 @@ class GitHubFeatureFlags {
         this.repositoryNwo = repositoryNwo;
         this.logger = logger;
     }
+    /**
+     *
+     * @param flag The feature flag to check.
+     * @param codeql An optional CodeQL object. If provided, and a `minimumVersion` is specified for the
+     *        feature flag, the version of the CodeQL CLI will be checked against the minimum version.
+     *        If the version is less than the minimum version, the feature flag will be considered
+     *        disabled. If not provided, and a `minimumVersion` is specified for the feature flag, the
+     *        this function will throw.
+     * @returns true if the feature flag is enabled, false otherwise.
+     *
+     * @throws if a `minimumVersion` is specified for the feature flag, and `codeql` is not provided.
+     */
     async getValue(flag, codeql) {
+        if (!codeql && exports.featureFlagConfig[flag].minimumVersion) {
+            throw new Error(`A minimum version is specified for feature flag ${flag}, but no instance of CodeQL was provided.`);
+        }
         // Bypassing the toolcache is disabled in test mode.
         if (flag === FeatureFlag.BypassToolcacheEnabled && util.isInTestMode()) {
             return false;