net-mgmt/prometheus2: Update to 2.33.5, switch to GO_MODULE

Changes:	https://github.com/prometheus/prometheus/releases/tag/v2.33.5

PR:		264316
Approved by:	David O'Rourke <dor.bsd@xm0.uk> (maintainer)

net-mgmt/prometheus2/Makefile

@@ -1,8 +1,9 @@
 PORTNAME=	prometheus
 DISTVERSIONPREFIX=	v
-DISTVERSION=	2.32.1
-PORTREVISION=	1
+DISTVERSION=	2.33.5
 CATEGORIES=	net-mgmt
+MASTER_SITES=	https://raw.githubusercontent.com/${GH_ACCOUNT}/${GH_PROJECT}/${DISTVERSIONFULL}/:gomod
+DISTFILES=	go.mod:gomod
 
 MAINTAINER=	dor.bsd@xm0.uk
 COMMENT=	Systems monitoring and alerting toolkit
@@ -16,6 +17,7 @@ USE_GITHUB=	yes
 GH_TUPLE=	ports-assets:net-mgmt_prometheus2:${DISTVERSIONFULL}:assets
 USE_RC_SUBR=	prometheus
 
+GO_MODULE=	github.com/prometheus/prometheus
 GO_TARGET=	./cmd/prometheus ./cmd/promtool
 GO_BUILDFLAGS=	-a -v -ldflags "${LD_FLAG_STRING}" -tags netgo,builtinassets
 
@@ -55,13 +57,6 @@ PROMETHEUS_USER?=			prometheus
 SOURCE_DATE_EPOCH_CMD=	date -ur $$(${GREP} TIMESTAMP ${DISTINFO_FILE} | ${SED} -e 's/[^0-9]//g') \
 			'+%Y%m%d-%T'
 
-# This file includes the GH_TUPLE and a post-extract section. Generated by
-# make gomod-vendor.  Ensure that the GH_TUPLE in this file is +=, otherwise
-# it will clobber our assets tuple above.
-# Generated with: sudo env M2T_GITHUB=$M2T_GITHUB make gomod-vendor > out
-# sudo required because gomod-vendor appears to be doing special things as root
-.include "Makefile.modules"
-
 post-patch:
 	@${LN} -s ${WRKSRC_assets}/web/ui/assets_vfsdata.go \
 		${WRKSRC}/web/ui/assets_vfadata.go