[v9] Bump minimum supported Node.js version

[lforst]

Description

• Go through engines fields in package.jsons and all READMEs if applicable and bump the minimum supported Node.js versions based on what we researched in (Spike) Investigate whether we can adjust the minimum compatible Node.js version to 16 or 18 for v9 #14256
• Prepare a docs PR to document our new minimum Node.js version.

[lforst]

UPDATE: OTEL plans on releasing a v2 version and they will likely bump to 18, meaning we would need to do the same. This task should be delayed until OTEL has decided on what to do.