wpcomsh: Add cli actions for post transfer process

[a8caustin]

Add post-transfer/clone/reset actions for

• Woo Express deactivate plugins
• Cache flush
• Set staging environment

Fixes #

Proposed changes:

Other information:

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Go to '..'

[github-actions]

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Wpcomsh plugin:

• Next scheduled release: August 6, 2024.
• Scheduled code freeze: July 29, 2024.

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[jmdodd]

LGTM.