monitoring: Disable custom repo-updater pod availability alert

Created by: tsenart

A 1m window is too small, and makes us receive pages for normal deployments. We want to get alerted on container restarts, but requires kube-state-metrics, which we don't yet have.

Created by: tsenart

cc @pecigonzalo

Created by: sourcegraph-bot

Notifying subscribers in CODENOTIFY files for diff 435492cc8d9d86a600286a7de5354c8f7d2393c8...11d982438155706feba719ace4f5756603f9a6fc.

Notify	File(s)
@bobheadxi	monitoring/definitions/repo_updater.go
@christinaforney	doc/admin/observability/alert_solutions.md
@slimsag	monitoring/definitions/repo_updater.go

Created by: pecigonzalo

@tsenart I reckon we could increase the time window instead, and keep this alert.

Created by: tsenart

@pecigonzalo: What do you think is an appropriate time window? By default, this is 10 minutes, which is what this reverted to.

Created by: pecigonzalo

I think between 5 and 10m makes sense, but I inferred from the title this disabling the alert altogether.

Created by: codecov[bot]

Codecov Report

Merging #16829 (11d9824) into main (435492c) will increase coverage by 0.00%. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main   #16829   +/-   ##
=======================================
  Coverage   52.48%   52.49%           
=======================================
  Files        1703     1703           
  Lines       84840    84840           
  Branches     7658     7712   +54     
=======================================
+ Hits        44527    44534    +7     
+ Misses      36411    36403    -8     
- Partials     3902     3903    +1     

Flag	Coverage Δ
go	51.70% <ø> (+0.01%)
integration	29.69% <ø> (+0.03%)
storybook	28.77% <ø> (ø)
typescript	54.38% <ø> (ø)
unit	34.99% <ø> (ø)

Impacted Files	Coverage Δ
enterprise/internal/campaigns/syncer/syncer.go	61.43% <0.00%> (+1.34%)
...nal/campaigns/resolvers/changeset_apply_preview.go	60.68% <0.00%> (+1.70%)
.../internal/codeintel/resolvers/graphql/locations.go	85.56% <0.00%> (+2.06%)