`citgm-continuous-integration` job is broken

[targos]

https://ci.nodejs.org/view/Node.js-citgm/job/citgm-continuous-integration/173/console

Fails with:

FATAL: For input string: "118, 50, 51]"
java.lang.NumberFormatException: For input string: "118, 50, 51]"
	at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:67)

[richardlau]

This is a variant of #2984 (comment) / #3023.

I've implemented a workaround based on #3025.

Test run: https://ci.nodejs.org/view/Node.js-citgm/job/citgm-continuous-integration/175/

[richardlau]

Test run: https://ci.nodejs.org/view/Node.js-citgm/job/citgm-continuous-integration/175/

(Also fixed the job to match against debian*-x64 (previously debian-64 -- presumably at some point we standardized on -x64).)