Remove buildkite configs and references (temporalio#5467)

## What changed?
<!-- Describe what has changed in this PR -->
Remove buildkite configs and references.

## Why?
<!-- Tell your future self why have you made these changes -->
Buildkite is no longer used.

## How did you test it?
<!-- How have you verified this change? Tested locally? Added a unit
test? Checked in staging env? -->
Existing tests.

## Potential risks
<!-- Assuming the worst case, what can be broken when deploying this
change to production? -->
No.

## Documentation
<!-- Have you made sure this change doesn't falsify anything currently
stated in `docs/`? If significant
new behavior is added, have you described that in `docs/`? -->
N/A

## Is hotfix candidate?
<!-- Is this PR a hotfix candidate or does it require a notification to
be sent to the broader community? (Yes/No) -->
No.

Makefile

@@ -8,7 +8,7 @@ bins: temporal-server temporal-cassandra-tool temporal-sql-tool tdbg
 # Install all tools, recompile proto files, run all possible checks and tests (long but comprehensive).
 all: update-tools clean proto bins check test
 
-# Used by Buildkite.
+# Used in CI
 ci-build-misc: print-go-version ci-update-tools proto bins shell-check copyright-check go-generate gomodtidy ensure-no-changes
 
 # Delete all build artifacts
@@ -44,9 +44,6 @@ ifdef TEST_TAG
 override TEST_TAG := -tags $(TEST_TAG)
 endif
 
-export TEST_TOTAL_SHARDS ?= $(BUILDKITE_PARALLEL_JOB_COUNT)
-export TEST_SHARD_INDEX ?= $(BUILDKITE_PARALLEL_JOB)
-
 ##### Variables ######
 
 GOBIN := $(if $(shell go env GOBIN),$(shell go env GOBIN),$(GOPATH)/bin)
@@ -383,11 +380,6 @@ coverage-report: $(SUMMARY_COVER_PROFILE)
 	@printf $(COLOR) "Generate HTML report from $(SUMMARY_COVER_PROFILE) to $(SUMMARY_COVER_PROFILE).html..."
 	@go tool cover -html=$(SUMMARY_COVER_PROFILE) -o $(SUMMARY_COVER_PROFILE).html
 
-ci-coverage-report: $(SUMMARY_COVER_PROFILE) coverage-report
-	@printf $(COLOR) "Generate Coveralls report from $(SUMMARY_COVER_PROFILE)..."
-	go install github.com/mattn/[email protected]
-	@goveralls -coverprofile=$(SUMMARY_COVER_PROFILE) -service=buildkite || true
-
 ##### Schema #####
 install-schema-cass-es: temporal-cassandra-tool install-schema-es
 	@printf $(COLOR) "Install Cassandra schema..."
@@ -516,16 +508,11 @@ update-dashboards:
 gomodtidy:
 	@printf $(COLOR) "go mod tidy..."
 	@go mod tidy
-	@$(MAKE) update-third-party-deps
 
 update-dependencies:
 	@printf $(COLOR) "Update dependencies..."
 	@go get -u -t $(PINNED_DEPENDENCIES) ./...
 	@go mod tidy
-	@$(MAKE) update-third-party-deps
-
-update-third-party-deps:
-	@GOOS=linux GOARCH=amd64 go list -deps $(FUNCTIONAL_TEST_ROOT) | sort -u | grep '^[a-z]\+\.[a-z.]\+/' | grep -v go.temporal.io > develop/buildkite/third_party_deps.txt
 
 go-generate:
 	@printf $(COLOR) "Process go:generate directives..."

README.md

@@ -1,4 +1,4 @@
-[![Build status](https://badge.buildkite.com/98c157ed502d55722ef7f28e6470aa20702c76d6989a0a5a89.svg?branch=main)](https://buildkite.com/temporal/temporal-public)
+[![Build status](https://github.com/temporalio/temporal/actions/workflows/run-tests.yml/badge.svg?branch=main)](https://github.com/temporalio/temporal/commits/main/)
 [![Coverage Status](https://coveralls.io/repos/github/temporalio/temporal/badge.svg?branch=main)](https://coveralls.io/github/temporalio/temporal?branch=main)
 [![Discourse](https://img.shields.io/static/v1?label=Discourse&message=Get%20Help&color=informational)](https://community.temporal.io)
 [![Go Report Card][go-report-image]][go-report-url]

common/persistence/tests/postgresql_test.go

@@ -176,23 +176,12 @@ func (p *PostgreSQLSuite) TestPostgreSQLClusterMetadataPersistence() {
 	suite.Run(p.T(), s)
 }
 
-// TODO flaky test in buildkite
-// https://go.temporal.io/server/issues/2877
-/*
-FAIL: TestPostgreSQLQueuePersistence/TestNamespaceReplicationQueue (0.26s)
-        queuePersistenceTest.go:102:
-            	Error Trace:	queuePersistenceTest.go:102
-            	Error:      	Not equal:
-            	            	expected: 99
-            	            	actual  : 98
-            	Test:       	TestPostgreSQLQueuePersistence/TestNamespaceReplicationQueue
-*/
-// func (p *PostgreSQLSuite) TestPostgreSQLQueuePersistence() {
-// 	s := new(persistencetests.QueuePersistenceSuite)
-// 	s.TestBase = persistencetests.NewTestBaseWithSQL(persistencetests.GetPostgreSQLTestClusterOption())
-// 	s.TestBase.Setup(nil)
-// 	suite.Run(p.T(), s)
-// }
+func (p *PostgreSQLSuite) TestPostgreSQLQueuePersistence() {
+	s := new(persistencetests.QueuePersistenceSuite)
+	s.TestBase = persistencetests.NewTestBaseWithSQL(persistencetests.GetPostgreSQLTestClusterOption())
+	s.TestBase.Setup(nil)
+	suite.Run(p.T(), s)
+}
 
 // SQL store tests