Expose additional builder booster related flags in the vc (#5086)

* expose builder booster flags in vc, enable options in validator endpoints, update tests

* resolve failing test

* fix issues related to CreateConfig and MoveConfig

* remove unneeded val, change how boost factor flag logic in the vc, add some additional documentation

* fix typos

* fix typos

* assume builder-proosals flag if one of other two vc builder flags are present

* fmt

* typo

* typo

* Fix CLI help text

* Prioritise per validator builder boost configurations over CLI flags.

* Add http test for builder boost factor with process defaults.

* Fix issue with PATCH request

* Add prefer builder proposals

* Add more builder boost factor tests.

---------

Co-authored-by: Mac L <mjladson@pm.me>
Co-authored-by: Jimmy Chen <jchen.tc@gmail.com>
Co-authored-by: Paul Hauner <paul@paulhauner.com>

lighthouse/tests/validator_client.rs

@@ -464,6 +464,32 @@ fn builder_proposals_flag() {
         .with_config(|config| assert!(config.builder_proposals));
 }
 #[test]
+fn builder_boost_factor_flag() {
+    CommandLineTest::new()
+        .flag("builder-boost-factor", Some("150"))
+        .run()
+        .with_config(|config| assert_eq!(config.builder_boost_factor, Some(150)));
+}
+#[test]
+fn no_builder_boost_factor_flag() {
+    CommandLineTest::new()
+        .run()
+        .with_config(|config| assert_eq!(config.builder_boost_factor, None));
+}
+#[test]
+fn prefer_builder_proposals_flag() {
+    CommandLineTest::new()
+        .flag("prefer-builder-proposals", None)
+        .run()
+        .with_config(|config| assert!(config.prefer_builder_proposals));
+}
+#[test]
+fn no_prefer_builder_proposals_flag() {
+    CommandLineTest::new()
+        .run()
+        .with_config(|config| assert!(!config.prefer_builder_proposals));
+}
+#[test]
 fn no_builder_registration_timestamp_override_flag() {
     CommandLineTest::new()
         .run()