test(dep): update test runner to latest (19.0.2) and improve tests

[bernardobridge]

Description

Updates tap from 16 to 19. As there are some changes between versions, I fixed some things and also made a couple of quality of life improvements too:

• Set disable coverage and color options in a package.json tap config, so we don't have to add --color and coverage flags on every time
• Also set export ARTILLERY_TELEMETRY_DEFAULTS='{"source":"test-suite"}' in the tap config

As a result, the npm scripts are now a lot shorter and it's harder to forget default flags/variables 👌

Note: reviewing per commit is easier.

Pre-merge checklist

• Does this require an update to the docs? No
• Does this require a changelog entry? No