Add x-client in ide-metrics component

[mustard-mh]

Description

Add x-client a global setting in ide-metrics

TODOs

• ‼️ After this PR, supervisor public api metrics will be broken, so we need to change ide supervisor public api SLO

Related Issue(s)

Fixes #

How to test

Check also test results #16701 (comment)

• Open workspace in preview env https://hw-metrics-client.preview.gitpod-dev.com/workspaces
• ide-metrics in preview env should correctly setup metric_client for supervisor public api metrics

debug mode

• Open this PR with Gitpod
• Exec commands below

cd components/ide-metrics
# start metric server
go run main.go run --config config-example.json --json-log=false --verbose

# post curl
curl -X "POST" "http://localhost:3000/metrics-api/metrics/counter/add/gitpod_test_counter" \
     -H 'x-client: vscode' \
     -H 'Content-Type: application/json; charset=utf-8' 

• /metrics endpoint at port 9500 should have metric_client field with vscode

Release Notes

NONE

Documentation

Build Options:

• /werft with-github-actions
  Experimental feature to run the build with GitHub Actions (and not in Werft).
• leeway-no-cache
  leeway-target=components:all
• /werft no-test
  Run Leeway with --dont-test

Publish Options

• /werft publish-to-npm
• /werft publish-to-jb-marketplace

Installer Options

• with-ee-license
• with-dedicated-emulation
• with-ws-manager-mk2
• workspace-feature-flags
  Add desired feature flags to the end of the line above, space separated

Preview Environment Options:

• /werft with-local-preview
  If enabled this will build install/preview
• /werft with-preview
• /werft with-large-vm
• /werft with-gce-vm
  If enabled this will create the environment on GCE infra
• /werft with-integration-tests=all
  Valid options are all, workspace, webapp, ide, jetbrains, vscode, ssh

[werft-gitpod-dev-com]

started the job as gitpod-build-hw-metrics-client.2 because the annotations in the pull request description changed
(with .werft/ from main)

[werft-gitpod-dev-com]

started the job as gitpod-build-hw-metrics-client.5 because the annotations in the pull request description changed
(with .werft/ from main)

[mustard-mh]

/werft run

👍 started the job as gitpod-build-hw-metrics-client.6
(with .werft/ from main)

[mustard-mh]

✅ Metric for supervisor public api won't break + with correct metric_client=superviosr

✅ In debug mode

[akosyakov]

code looks good, i did not try

/hold

unhold when are ready to merge

[mustard-mh]

/unhold