chore!: adopt log/slog, drop go-kit/log (#875)

* chore!: adopt log/slog, drop go-kit/log

Requires: prometheus/common#697

This PR includes:
- linter updates to enable `sloglint` linter
- Go dep updates for prometheus/{client_golang,common,exporter-toolkit}
  libs
- refactorings to adopt log/slog in favor of go-kit/log

The bulk of this PR was automated by the following script which is being
used to aid in converting the various exporters/projects to use slog:

https://gist.github.com/tjhop/49f96fb7ebbe55b12deee0b0312d8434

Builds and passes tests locally with go workspaces and up-to-date main
branch of prometheus/common.

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

* build(deps): bump prometheus/common to v0.60.0

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

---------

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

collector/mysql_user.go

@@ -19,10 +19,10 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"log/slog"
 	"strings"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -120,7 +120,7 @@ func (ScrapeUser) Version() float64 {
 }
 
 // Scrape collects data from database connection and sends it over channel as prometheus metric.
-func (ScrapeUser) Scrape(ctx context.Context, instance *instance, ch chan<- prometheus.Metric, logger log.Logger) error {
+func (ScrapeUser) Scrape(ctx context.Context, instance *instance, ch chan<- prometheus.Metric, logger *slog.Logger) error {
 	db := instance.getDB()
 	var (
 		userRows *sql.Rows