chore: Update end to end tracing documentation · googleapis/nodejs-spanner@da120d3

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636

The process '/usr/bin/git' failed with exit code 128

Run npm run lint: observability-test/database.ts#L97

Unexpected any. Specify a different type

Run npm run lint: samples/resource/singer.d.ts#L39

'SingerInfo' is defined but never used

Run npm run lint: samples/resource/singer.d.ts#L130

Unexpected any. Specify a different type

Run npm run lint: samples/resource/singer.d.ts#L138

Unexpected any. Specify a different type

Run npm run lint: samples/resource/singer.d.ts#L150

Unexpected any. Specify a different type

Run npm run lint: samples/resource/singer.d.ts#L156

Unexpected any. Specify a different type

Run npm run lint: samples/resource/singer.d.ts#L167

'Genre' is defined but never used

Run npm run lint: src/instrument.ts#L259

'key' is defined but never used

Run npm run lint: src/instrument.ts#L259

'value' is defined but never used

Run npm run lint: src/instrument.ts#L263

'attributes' is defined but never used

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