fix(snap): ignore unstable env setup output in incompatible node tests

Author: fengmk2

packages/cli/snap-tests-global/runtime-with-incompatible-env-node/snap.txt

@@ -1,7 +1,4 @@
 > vp env use 20.0.0
-Installing Node.js v<semver>...
-Using Node.js v<semver> (resolved from <semver>)
-
 [1]> vp exec node --version
 VITE+ - The Unified Toolchain for the Web
 

packages/cli/snap-tests-global/runtime-with-incompatible-env-node/steps.json

@@ -1,6 +1,6 @@
 {
   "serial": true,
   "ignoredPlatforms": ["win32"],
-  "commands": ["vp env use 20.0.0", "vp exec node --version"],
+  "commands": [{ "command": "vp env use 20.0.0", "ignoreOutput": true }, "vp exec node --version"],
   "after": ["vp env use --unset"]
 }

packages/cli/snap-tests-global/runtime-with-incompatible-global-node/snap.txt

@@ -1,8 +1,4 @@
 > vp env default 20.0.0
-VITE+ - The Unified Toolchain for the Web
-
-✓ Default Node.js version set to <semver>
-
 [1]> vp migrate --yes
 error: Node.js <semver> is incompatible with Vite+ CLI.
 Required by Vite+: ^20.19.0 || >=22.12.0

packages/cli/snap-tests-global/runtime-with-incompatible-global-node/steps.json

@@ -1,6 +1,6 @@
 {
   "serial": true,
   "env": {},
-  "commands": ["vp env default 20.0.0", "vp migrate --yes"],
+  "commands": [{ "command": "vp env default 20.0.0", "ignoreOutput": true }, "vp migrate --yes"],
   "after": ["vp env default lts"]
 }