Add environment variables to signal feature and version to the CLI

This PR ensures environment variables are set before any invocation of
the CLI.  Here is a list of vars that are set:

https://github.com/github/codeql-coreql-team/issues/1124#issuecomment-852463521

This ensures the CLI knows the features and versions of the containing
actions/runner.

Additionally:

- Fix the user agent so that it more closely aligns with user agent
  spec
- Refactor environment variable initialization so that it all happens in
  one place and call.
- Move Mode, getRequiredEnvParam, setMode, getMode out of actions-util
  and into util. actions-util is meant for utils only called by the
  action, not the runner.

The `prepareLocalRunEnvironment()` method is most likely deprecated and
should be removed. I originally added it because I had a way of working
where I would run the action from my local machine to test out changes,
but this was always a little flaky. So, I no longer use this way of
working. I will probably remove it soon.

lib/api-client.test.js

@@ -13,16 +13,16 @@ Object.defineProperty(exports, "__esModule", { value: true });
 const githubUtils = __importStar(require("@actions/github/lib/utils"));
 const ava_1 = __importDefault(require("ava"));
 const sinon_1 = __importDefault(require("sinon"));
-const actions_util_1 = require("./actions-util");
 const api_client_1 = require("./api-client");
 const testing_utils_1 = require("./testing-utils");
+const util_1 = require("./util");
 // eslint-disable-next-line import/no-commonjs
 const pkg = require("../package.json");
 testing_utils_1.setupTests(ava_1.default);
 let githubStub;
 ava_1.default.beforeEach(() => {
     githubStub = sinon_1.default.stub(githubUtils, "GitHub");
-    actions_util_1.setMode(actions_util_1.Mode.actions);
+    util_1.initializeEnvironment(util_1.Mode.actions, pkg.version);
 });
 ava_1.default("Get the client API", async (t) => {
     doTest(t, {
@@ -32,7 +32,7 @@ ava_1.default("Get the client API", async (t) => {
     }, undefined, {
         auth: "token xyz",
         baseUrl: "http://hucairz/api/v3",
-        userAgent: `CodeQL Action/${pkg.version}`,
+        userAgent: `CodeQL-Action/${pkg.version}`,
     });
 });
 ava_1.default("Get the client API external", async (t) => {
@@ -43,7 +43,7 @@ ava_1.default("Get the client API external", async (t) => {
     }, { allowExternal: true }, {
         auth: "token abc",
         baseUrl: "http://hucairz/api/v3",
-        userAgent: `CodeQL Action/${pkg.version}`,
+        userAgent: `CodeQL-Action/${pkg.version}`,
     });
 });
 ava_1.default("Get the client API external not present", async (t) => {
@@ -53,7 +53,7 @@ ava_1.default("Get the client API external not present", async (t) => {
     }, { allowExternal: true }, {
         auth: "token xyz",
         baseUrl: "http://hucairz/api/v3",
-        userAgent: `CodeQL Action/${pkg.version}`,
+        userAgent: `CodeQL-Action/${pkg.version}`,
     });
 });
 ava_1.default("Get the client API with github url", async (t) => {
@@ -63,7 +63,7 @@ ava_1.default("Get the client API with github url", async (t) => {
     }, undefined, {
         auth: "token xyz",
         baseUrl: "https://api.github.com",
-        userAgent: `CodeQL Action/${pkg.version}`,
+        userAgent: `CodeQL-Action/${pkg.version}`,
     });
 });
 function doTest(t, clientArgs, clientOptions, expected) {