Reapply "prometheus: update to 2.49.1."

The "too many open files" issue affects the reverted version anyway, so
we'll try just increasing the ulimit.

This reverts commit b779aacd12.

srcpkgs/prometheus/template

@@ -1,16 +1,15 @@
 # Template file for 'prometheus'
 pkgname=prometheus
-# https://build.voidlinux.org/builders/x86_64_builder/builds/46045/steps/shell_3/logs/stdio
-reverts="2.49.1_1"
-version=2.43.0
-revision=4
+version=2.49.1
+revision=2
 build_style=go
 go_import_path="github.com/prometheus/prometheus"
 go_package="github.com/prometheus/prometheus/cmd/prometheus github.com/prometheus/prometheus/cmd/promtool"
-go_ldflags="-X ${go_import_path}/version.Version=${version}
- -X ${go_import_path}/version.Revision=${version}
- -X ${go_import_path}/version.Branch=${version}
- -X ${go_import_path}/version.BuildUser=VoidLinux"
+go_ldflags="-X github.com/prometheus/common/version.Version=${version}
+ -X github.com/prometheus/common/version.Revision=${version}
+ -X github.com/prometheus/common/version.Branch=${version}
+ -X github.com/prometheus/common/version.BuildDate=$(date --date "@$SOURCE_DATE_EPOCH" "+%Y%m%d-%H:%M:%S")
+ -X github.com/prometheus/common/version.BuildUser=VoidLinux"
 go_build_tags="netgo,builtinassets"
 hostmakedepends="yarn"
 conf_files="/etc/prometheus/prometheus.yml"
@@ -20,14 +19,14 @@ license="Apache-2.0, MIT"
 homepage="https://prometheus.io/"
 changelog="https://raw.githubusercontent.com/prometheus/prometheus/master/CHANGELOG.md"
 distfiles="https://github.com/prometheus/prometheus/archive/v${version}.tar.gz"
-checksum=0cd8860e5f10d0ecb35d20d23252ddc459e8319882dc163bf71b723e3bcafd71
+checksum=985d7f45ed3d16e23a30eae490c17911518fae96cba0245d493eb07097a10b3b
 
 system_accounts="_prometheus"
 
 make_dirs="/var/lib/prometheus 700 _prometheus _prometheus"
 
 pre_build() {
-	CGO_ENABLED=0 GOARCH= make assets assets-compress
+	( ulimit -n 4096 && CGO_ENABLED=0 GOARCH= make assets assets-compress )
 }
 
 post_install() {