Set go version to 1.22, tweak coverage (mindersec#2630)

We have decided to exclude anything under cmd for coverage since we do
not want to rely on unit testing for the CLI.

Go 1.22 reimplements the coverage tool. Unfortunately, the new
implementation has a bug. Disable the new coverage logic for now.

.mk/test.mk

@@ -17,7 +17,7 @@
 # in future, we may want to parse these from a file instead of hardcoding them
 # in the Makefile
 COVERAGE_EXCLUSIONS="internal/db\|/mock/"
-COVERAGE_PACKAGES=./internal/...,./cmd/...
+COVERAGE_PACKAGES=./internal/...
 
 .PHONY: clean
 clean: ## clean up environment
@@ -33,7 +33,11 @@ test-silent: clean init-examples ## run tests in a silent mode (errors only outp
 
 .PHONY: cover
 cover: init-examples ## display test coverage
-	go test -v -coverpkg=${COVERAGE_PACKAGES} -coverprofile=coverage.out.tmp -race ./...
+	# There is a bug in the new coverage logic implemented in go 1.22.
+	# The recommended workaround is to disable the new coverage logic until
+	# this is fixed.
+	# See: https://github.com/golang/go/issues/65653
+	GOEXPERIMENT=nocoverageredesign go test -v -coverpkg=${COVERAGE_PACKAGES} -coverprofile=coverage.out.tmp -race ./...
 	cat coverage.out.tmp | grep -v ${COVERAGE_EXCLUSIONS} > coverage.out
 	rm coverage.out.tmp
 	go tool cover -func=coverage.out

go.mod

@@ -1,6 +1,6 @@
 module github.com/stacklok/minder
 
-go 1.21.7
+go 1.22.1
 
 require (
 	github.com/AlecAivazis/survey/v2 v2.3.7