fix: do not watch specs on run mode

[estrada9166]

• Closes Cypress 10 watch all files when executing cypress run #22054

User facing changelog

Additional details

• Fix the issue 1 linked here Cypress 10 watch all files when executing cypress run #22054 (comment)
• We were watching for the specs even in run mode - but, we were not only watching the specs that matches the specPatter, making the watcher look for a lot of files that were unneeded, even in run mode

Steps to test

How has the user experience changed?

PR Tasks

• Have tests been added/updated?
• Has the original issue (or this PR, if no issue exists) been tagged with a release in ZenHub? (user-facing changes only)
• Has a PR for user-facing changes been opened in cypress-documentation?
• Have API changes been updated in the type definitions?

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[cypress]

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Test summary

4377 • 0 • 49 • 0 • 1

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Run details

Project	cypress
Status	Passed
Commit	fb66ea3
Started	Jun 2, 2022 8:06 PM
Ended	Jun 2, 2022 8:19 PM
Duration	12:48 💡
OS	Linux Debian - 10.11
Browser	Electron 100

View run in Cypress Dashboard ➡️

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Flakiness

	cypress/e2e/cypress/proxy-logging.cy.ts		1
1	Proxy Logging > request logging > xhr log has response body/status code when xhr response is logged second

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