Add support for configuring npm version in Node devcontainers #2940

Job	Run time
detect-changes	4s
test-scenarios (node)	21m 26s
test (node, mcr.microsoft.com/devcontainers/base:debian)	48s
test (node, mcr.microsoft.com/devcontainers/base:ubuntu)	47s
test (node, ubuntu:focal)	52s
test (node, debian:11)	42s
test (node, debian:12)	43s
test (node, mcr.microsoft.com/devcontainers/base:noble)	39s
test (node, ubuntu:jammy)	54s
	26m 55s

Provide feedback