Add Node.js 17 and 18 support

[joshwlewis]

This PR is sort of an array of fixes related to improving support for Node.js 17 and 18.

Note that Node.js 17 is already retired and unsupported, but it's still possible for customers to use.

• Adds the metrics plugin for Node.js 17 and 18.
• Drops Node.js 12 metrics plugin updates.
• Adds CI tests explicitly for Node.js 17 and 18.
• Adjusts the range of Node.js versions that support metrics
• Adjusts the range of Node.js versions we test against
• Adds error messaging to help folks seeing failed builds due to the incompatibility of Node.js 18+ and heroku-18 (Node.js 18 wants libc6 2.28, which isn't available on heroku-18).
• Fixes the broken test (was failing due to the Node.js 18+ and heroku-18 incompatibility)

GUS-W-11190190

[colincasey]

👍 but it would nice to back this with a test. is it possible to have a test that runs only for a specific stack?

[joshwlewis]

👍 but it would nice to back this with a test. is it possible to have a test that runs only for a specific stack?

Yes, I agree. I was already working on it. The test proved that my original implementation wasn't working. I had to add some stderr redirection to get the node: /lib/x86_64-linux-gnu/libc.so.6: version 'GLIBC_2.28' not found (required by node) into the output log that we analyze.