Update module github.com/prometheus/client_golang to v1.15.1

go.mod

go.sum

vendor/github.com/cespare/xxhash/v2/README.md

vendor/github.com/cespare/xxhash/v2/testall.sh

vendor/github.com/cespare/xxhash/v2/xxhash.go

vendor/github.com/cespare/xxhash/v2/xxhash_amd64.s

vendor/github.com/cespare/xxhash/v2/xxhash_arm64.s

vendor/github.com/cespare/xxhash/v2/xxhash_asm.go

vendor/github.com/cespare/xxhash/v2/xxhash_other.go

vendor/github.com/cespare/xxhash/v2/xxhash_safe.go

vendor/github.com/cespare/xxhash/v2/xxhash_unsafe.go

vendor/github.com/golang/protobuf/ptypes/any.go

vendor/github.com/golang/protobuf/ptypes/any/any.pb.go

vendor/github.com/golang/protobuf/ptypes/doc.go

vendor/github.com/golang/protobuf/ptypes/duration.go

...github.com/golang/protobuf/ptypes/duration/duration.pb.go

vendor/github.com/golang/protobuf/ptypes/timestamp.go

...thub.com/prometheus/client_golang/prometheus/collector.go

...github.com/prometheus/client_golang/prometheus/counter.go

...or/github.com/prometheus/client_golang/prometheus/desc.go