Fix Build Image tests

[Saipriya-1144]

Conda tests:
github actions image don't have conda in it, hence skipped the tests.

Yarn test:
CanBuildAndRunNodeAppWithoutWorkspace_UsingYarn2ForBuild

the next version in sample app is incompatible with node version

With node 20:

Lerna tests:
GeneratesScript_AndBuildMonorepoAppUsingLerna_Yarn
GeneratesScript_AndBuildMonorepoAppUsingLerna_Npm
GeneratesScript_AndBuilds_UsingSuppliedPackageDir_WhenPackageDirAndSourceDirAreSame

For Lerna-based monorepo apps, InstallLernaCommand (npm install --global lerna or npm install --global lerna --no-package-lock) is set in NodePlatform.cs but never executed in NodeBashBuildSnippet.sh.tpl before running lerna commands, causing 'lerna: command not found' errors

After installing lerna command

lerna commands executed.

This code path is never used by any app, skipping the test for now.

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