chore(lint): replace hard-coded separators with path.sep

[matt9ucci]

Build on Windows fails due to the hard-coded file path separators ('/') in the eslint rule invalid-cfn-imports.ts.
The error message is "no such file or directory, open 'C:\aws-cdk\tools@aws-cdk\pkglint\bin\pkglint.ts\package.json'" as follows:

$ npx lerna run build --scope=aws-cdk-lib
lerna notice cli v7.1.4
lerna notice filter including "aws-cdk-lib"
lerna info filter [ 'aws-cdk-lib' ]

   ×    1/3 dependent project tasks failed (see below)
   √    2/3 dependent project tasks succeeded [0 read from cache]

 ———————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————— 


> @aws-cdk/pkglint:build

yarn run v1.22.19
$ tsc -b && eslint . --ext=.ts && chmod +x bin/pkglint
DeprecationWarning: 'originalKeywordKind' has been deprecated since v5.0.0 and will no longer be usable after v5.2.0. Use 'identifierToKeywordKind(identifier)' instead.

Oops! Something went wrong! :(

ESLint: 7.32.0

Error: Error while loading rule '@aws-cdk/invalid-cfn-imports': ENOENT: no such file or directory, open 'C:\aws-cdk\tools\@aws-cdk\pkglint\bin\pkglint.ts\package.json'
Occurred while linting C:\aws-cdk\tools\@aws-cdk\pkglint\bin\pkglint.ts
    at Object.openSync (node:fs:603:3)
    at Object.readFileSync (node:fs:471:35)
    at isAlphaPackage (C:\aws-cdk\tools\@aws-cdk\eslint-plugin\lib\rules\invalid-cfn-imports.js:139:31)
    at currentFileIsInAlphaPackage (C:\aws-cdk\tools\@aws-cdk\eslint-plugin\lib\rules\invalid-cfn-imports.js:110:16)       
    at Object.create (C:\aws-cdk\tools\@aws-cdk\eslint-plugin\lib\rules\invalid-cfn-imports.js:12:10)
    at createRuleListeners (C:\aws-cdk\node_modules\eslint\lib\linter\linter.js:765:21)
    at C:\aws-cdk\node_modules\eslint\lib\linter\linter.js:937:31
    at Array.forEach (<anonymous>)
    at runRules (C:\aws-cdk\node_modules\eslint\lib\linter\linter.js:882:34)
    at Linter._verifyWithoutProcessors (C:\aws-cdk\node_modules\eslint\lib\linter\linter.js:1181:31)
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Replace all with path.sep, cross-platform separator.

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: f41053a
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).