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>

validator_client/src/cli.rs

@@ -349,4 +349,22 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
                 .default_value("500")
                 .takes_value(true),
         )
+        .arg(
+            Arg::with_name("builder-boost-factor")
+                .long("builder-boost-factor")
+                .value_name("UINT64")
+                .help("Defines the boost factor, \
+                    a percentage multiplier to apply to the builder's payload value \
+                    when choosing between a builder payload header and payload from \
+                    the local execution node.")
+                .conflicts_with("prefer-builder-proposals")
+                .takes_value(true),
+        )
+        .arg(
+            Arg::with_name("prefer-builder-proposals")
+                .long("prefer-builder-proposals")
+                .help("If this flag is set, Lighthouse will always prefer blocks \
+                    constructed by builders, regardless of payload value.")
+                .takes_value(false),
+        )
 }