gRPC Gateway Removal (#14089)

* wip passing e2e

* reverting temp comment

* remove unneeded comments

* fixing merge errors

* fixing more bugs from merge

* fixing test

* WIP moving code around and fixing tests

* unused linting

* gaz

* temp removing these tests as we need placeholder/wrapper APIs for them with the removal of the gateway

* attempting to remove dependencies to gRPC gateway , 1 mroe left in deps.bzl

* renaming flags and other gateway services to http

* goimport

* fixing deepsource

* git mv

* Update validator/package/validator.yaml

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update validator/package/validator.yaml

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update cmd/beacon-chain/flags/base.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update cmd/beacon-chain/flags/base.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update cmd/beacon-chain/flags/base.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* addressing feedback

* missed lint

* renaming import

* reversal based on feedback

* fixing web ui registration

* don't require mux handler

* gaz

* removing gRPC service from validator completely, merged with http service, renames are a work in progress

* updating go.sum

* linting

* trailing white space

* realized there was more cleanup i could do with code reuse

* adding wrapper for routes

* reverting version

* fixing dependencies from merging develop

* gaz

* fixing unit test

* fixing dependencies

* reverting unit test

* fixing conflict

* updating change log

* Update log.go

Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>

* gaz

* Update api/server/httprest/server.go

Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>

* addressing some feedback

* forgot to remove deprecated flag in usage

* gofmt

* fixing test

* fixing deepsource issue

* moving deprecated flag and adding timeout handler

* missed removal of a flag

* fixing test:

* Update CHANGELOG.md

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* addressing feedback

* updating comments based on feedback

* removing unused field for now, we can add it back in if we need to use the option

* removing unused struct

* changing api-timeout flag based on feedback

---------

Co-authored-by: Radosław Kapka <rkapka@wp.pl>
Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>

validator/node/BUILD.bazel

@@ -34,7 +34,6 @@ go_library(
     ],
     deps = [
         "//api:go_default_library",
-        "//api/gateway:go_default_library",
         "//api/server/middleware:go_default_library",
         "//async/event:go_default_library",
         "//cmd:go_default_library",
@@ -47,7 +46,6 @@ go_library(
         "//monitoring/backup:go_default_library",
         "//monitoring/prometheus:go_default_library",
         "//monitoring/tracing:go_default_library",
-        "//proto/prysm/v1alpha1:go_default_library",
         "//runtime:go_default_library",
         "//runtime/debug:go_default_library",
         "//runtime/prereqs:go_default_library",
@@ -62,12 +60,9 @@ go_library(
         "//validator/keymanager/local:go_default_library",
         "//validator/keymanager/remote-web3signer:go_default_library",
         "//validator/rpc:go_default_library",
-        "//validator/web:go_default_library",
         "@com_github_gorilla_mux//:go_default_library",
-        "@com_github_grpc_ecosystem_grpc_gateway_v2//runtime:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
         "@com_github_urfave_cli_v2//:go_default_library",
-        "@org_golang_google_protobuf//encoding/protojson:go_default_library",
     ],
 )