fix(devkit): parseTargetString should support targets with colons in their name

[AgentEnder]

Current Behavior

The CLI can run targets with colons in their name, but devkit fails to parse target strings containing these targets.

Expected Behavior

The CLI and devkit behavior is the same

Related Issue(s)

Related: #10398

• This was discovered when investigating the issue, but the actual issue is more of a docs concern.

[nx-cloud]

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✅ Successfully ran 12 targets

• nx affected --target=build --base=d533b547692542726e24404700a4ac9a1e2631fb --head=de376f928be19e4f0123bde7ddca46e3f7e23644 --parallel=3
• nx affected --target=e2e --base=d533b547692542726e24404700a4ac9a1e2631fb --head=de376f928be19e4f0123bde7ddca46e3f7e23644 --exclude=e2e-detox,e2e-js,e2e-next,e2e-workspace-create,e2e-workspace-integrations,e2e-workspace-core,e2e-react,e2e-web,e2e-angular-extensions,e2e-angular-core,e2e-cli,e2e-nx-plugin,e2e-cypress,e2e-node,e2e-linter,e2e-jest,e2e-a...
• nx affected --target=e2e --base=d533b547692542726e24404700a4ac9a1e2631fb --head=de376f928be19e4f0123bde7ddca46e3f7e23644 --exclude=e2e-storybook,e2e-react-native,e2e-detox --parallel=1
• nx affected --target=lint --base=d533b547692542726e24404700a4ac9a1e2631fb --head=de376f928be19e4f0123bde7ddca46e3f7e23644 --parallel=3
• nx affected --target=test --base=d533b547692542726e24404700a4ac9a1e2631fb --head=de376f928be19e4f0123bde7ddca46e3f7e23644 --parallel=1
• nx build typedoc-theme
• nx-cloud record -- yarn check-commit
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn depcheck
• nx-cloud record -- yarn documentation
• nx-cloud record -- yarn nx format:check --base=d533b547692542726e24404700a4ac9a1e2631fb --head=de376f928be19e4f0123bde7ddca46e3f7e23644
• nx-cloud record -- yarn nx workspace-lint

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Name	Status	Preview	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	May 19, 2022 at 7:49PM (UTC)

[github-actions]

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