Absence of this label causes a panic because the setters try to access the label despite it never being added to the metric. This PR adds the label to the metrics, thus preventing the panic.

#### PR checklist

- [ ] Tests written/updated, or no tests needed
- [ ] `CHANGELOG_PENDING.md` updated, or no changelog entry needed
- [ ] Updated relevant documentation (`docs/`) and code comments, or no
      documentation updates needed

(cherry picked from commit f2c32c9)

Absence of this label causes a panic because the setters try to access the label despite it never being added to the metric. This PR adds the label to the metrics, thus preventing the panic.

#### PR checklist

- [ ] Tests written/updated, or no tests needed
- [ ] `CHANGELOG_PENDING.md` updated, or no changelog entry needed
- [ ] Updated relevant documentation (`docs/`) and code comments, or no
      documentation updates needed

(cherry picked from commit f2c32c9)

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

Absence of this label causes a panic because the setters try to access the label despite it never being added to the metric. This PR adds the label to the metrics, thus preventing the panic.

#### PR checklist

- [ ] Tests written/updated, or no tests needed
- [ ] `CHANGELOG_PENDING.md` updated, or no changelog entry needed
- [ ] Updated relevant documentation (`docs/`) and code comments, or no
      documentation updates needed

…x-rc1

* release/v0.37.0-rc1:
  QA Process report for v0.37.x (and baseline for v0.34.x) (tendermint#9499) (tendermint#9577)
  Fix TX payload for DO testnets (tendermint#9540) (tendermint#9542)
  blocksync: retry requests after timeout (backport tendermint#9518) (tendermint#9533)
  Extend the load report tool to include transactions' hashes (tendermint#9509) (tendermint#9513)
  build(deps): Bump styfle/cancel-workflow-action from 0.10.0 to 0.10.1 (tendermint#9502)
  build(deps): Bump actions/stale from 5 to 6 (tendermint#9494)
  loadtime: add block time to the data point (tendermint#9484) (tendermint#9489)
  config: Add missing storage section when generating config (tendermint#9483) (tendermint#9487)
  Sync Vote.Verify() in spec with implementation (tendermint#9466) (tendermint#9476)
  fix spec (tendermint#9467) (tendermint#9469)
  metrics: fix panic because of absent prometheus label (tendermint#9455) (tendermint#9474)
  Ensure Dockerfile stages use consistent Go version (backport tendermint#9462) (tendermint#9472)
  build(deps): Bump slackapi/slack-github-action from 1.21.0 to 1.22.0 (tendermint#9432)
  build(deps): Bump bufbuild/buf-setup-action from 1.7.0 to 1.8.0 (tendermint#9453)
  state: restore previous error message (tendermint#9435) (tendermint#9440)
  build(deps): Bump gonum.org/v1/gonum from 0.11.0 to 0.12.0 (tendermint#9411)
  docs: Update ADRs for v0.37 (tendermint#9399) (tendermint#9418)
  build(deps): Bump github.com/spf13/viper from 1.12.0 to 1.13.0 (tendermint#9410)
  build(deps): Bump github.com/lib/pq from 1.10.6 to 1.10.7 (tendermint#9409)
  feat: support HTTPS inside websocket (tendermint#9416) (tendermint#9422)
  Removed unused param (tendermint#9394)
  test: generate uuid on startup for load tool (tendermint#9383) (tendermint#9392)
  add redirect links (tendermint#9385) (tendermint#9389)
  refactor: migrate to cosmos/gogoproto (backport tendermint#9356) (tendermint#9381)
  cmd: print all versions of tendermint and its sub protocols  (tendermint#9329) (tendermint#9386)
  Add missing changes changelog files (backport tendermint#9376) (tendermint#9382)
  add separated runs by UUID (backport tendermint#9367) (tendermint#9379)
  spec: abci++ cleanup for v0.37 (backport tendermint#9288) (tendermint#9374)
  ci: Remove "(WARNING: BETA SOFTWARE)" tagline from all upcoming releases (tendermint#9371) (tendermint#9372)
  Update rpc client header (tendermint#9276) (tendermint#9349)
  ci: Pre-release workflows (backport tendermint#9366) (tendermint#9368)
  test: add the loadtime report tool (tendermint#9351) (tendermint#9364)
  Update Tendermint version to v0.37.0 (tendermint#9354)
  test: add the loadtime tool (tendermint#9342) (tendermint#9357)

# Conflicts:
#	version/version.go