1950386 - Migrate Legacy Telemetry Environment `build` fields to Glean metrics

Status: ASSIGNED

(Toolkit :: Telemetry, task, P1)

Description

[Chris H-C :chutten]

This bug is for defining and using Glean metrics to mirror Legacy Telemetry Environment fields in the build section. The fields and their needs are:

• applicationId - not needed (always the value "{ec8030f7-c20a-464f-9b0e-13a3a9e97384}")
• applicationName - not needed (in Glean it's encoded in the dataset name (e.g. firefox_desktop)
• architecture - bug 1944694
• buildid - Already `client_info.build_id
• version - not needed in favour of displayVersion
• vendor - not needed (always "Mozilla")
• displayVersion - Already client_info.app_display_version
• platformVersion - not needed in favour of displayVersion
• xpcomAbi - needs migration
• updaterAvailable - needs migration

"needs migration" means that the field must be either:

• removed (if you know that a field is unused or not useful, or can find an authority who can assert that), or
• have a Glean metric defined for it in an appropriate metrics.yaml in an appropriate component in the tree and instrumentation code added in TelemetryEnvironment.sys.mjs so that it begins reporting data

Remember to update the totals for fields you migrate.