backport of 8c18f24b9d (#21611) (#21614)

* combine into one checker

* combine and simplify ci checks

* add to test package list

* remove testing test

* only run deprecations check

* only run deprecations check

* remove unneeded repo check

* fix bash options

Co-authored-by: miagilepner <mia.epner@hashicorp.com>

tools/codechecker/pkg/gonilnilfunctions/analyzer_test.go

@@ -0,0 +1,23 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package gonilnilfunctions
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"golang.org/x/tools/go/analysis/analysistest"
+)
+
+// TestAnalyzer runs the analyzer on the test functions in testdata/funcs.go. The report from the analyzer is compared against
+// the comments in funcs.go beginning with "want." If there is no comment beginning with "want", then the analyzer is expected
+// not to report anything.
+func TestAnalyzer(t *testing.T) {
+	f, err := os.Getwd()
+	if err != nil {
+		t.Fatal("failed to get working directory", err)
+	}
+	analysistest.Run(t, filepath.Join(f, "testdata"), Analyzer, ".")
+}