Config registry (#10683)

* test coverage and updates to config twiddlers

* LoadChainConfigFile error if SetActive conflicts

* lint

* wip working around test issues

* more fixes, mass test updates

* lint

* linting

* thanks deepsource!

* fix undeclared vars

* fixing more undefined

* fix a bug, make a bug, repeat

* gaz

* use stock mainnet in case fork schedule matters

* remove unused KnownConfigs

* post-merge cleanup

* eliminating OverrideBeaconConfig outside tests

* more cleanup of OverrideBeaconConfig outside tests

* config for interop w/ genesis gen support

* improve var name

* API on package instead of exported value

* cleanup remainders of "registry" naming

* Nishant feedback

* add ropstein to configset

* lint

* lint #2

* ✂️

* revert accidental commented line

* check if active is nil (replace called on empty)

* Nishant feedback

* replace OverrideBeaconConfig call

* update interop instructions w/ new flag

* don't let interop replace config set via cli flags

Co-authored-by: kasey <kasey@users.noreply.github.com>

tools/benchmark-files-gen/main.go

@@ -51,6 +51,11 @@ func main() {
 		log.Fatal(err)
 	}
 
+	undo, err := benchmark.SetBenchmarkConfig()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer undo()
 	log.Printf("Output dir is: %s", *outputDir)
 	log.Println("Generating genesis state")
 	// Generating this for the 2 following states.
@@ -84,7 +89,6 @@ func generateGenesisBeaconState() error {
 }
 
 func generateMarshalledFullStateAndBlock() error {
-	benchmark.SetBenchmarkConfig()
 	beaconState, err := genesisBeaconState()
 	if err != nil {
 		return err
@@ -184,7 +188,6 @@ func generateMarshalledFullStateAndBlock() error {
 }
 
 func generate2FullEpochState() error {
-	benchmark.SetBenchmarkConfig()
 	beaconState, err := genesisBeaconState()
 	if err != nil {
 		return err