Short URL: Change default expiration to never (#115029)

* Short Links: Change default expiration to never expire (-1)

Previously, short links defaulted to expiring after 7 days. This change
updates the default to -1 (never expire) to prevent automatic deletion
of shared dashboard links.

Changes:
- conf/defaults.ini: Set expire_time = -1 and update comment
- conf/sample.ini: Set expire_time = -1 and update comment
- pkg/setting/setting.go: Update MustInt default from 7 to -1

The cleanup logic already handles -1 correctly (only runs when > 0),
so no changes needed there.

This unblocks progress on short URL feature improvements by ensuring
shared links remain accessible indefinitely by default.

* fix go

* update docs / comments

* update missed comment in sample.ini

* Revert "fix go"

This reverts commit e0d099ae31.

* chore: update workspace dependencies

Run 'make update-workspace' to sync Go workspace dependencies.
This updates go.mod and go.sum files to match the current workspace state.

* chore: add modowner for apps/quotas dependency

Assign @grafana/grafana-search-and-storage as owner for apps/quotas
dependency to satisfy modowners CI check.

pkg/setting/setting.go

@@ -1330,7 +1330,7 @@ func (cfg *Cfg) parseINIFile(iniFile *ini.File) error {
 	cfg.QueryHistoryEnabled = queryHistory.Key("enabled").MustBool(true)
 
 	shortLinks := iniFile.Section("short_links")
-	cfg.ShortLinkExpiration = shortLinks.Key("expire_time").MustInt(7)
+	cfg.ShortLinkExpiration = shortLinks.Key("expire_time").MustInt(-1)
 
 	if cfg.ShortLinkExpiration > 365 {
 		cfg.Logger.Warn("short_links expire_time must be less than 366 days. Setting to 365 days")