Update conda env run commands

[carolineechen]

use conda run -n <env_name> $SHELL shelx.quote(user_command) to better handle bash commands

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: runhouse/resources/hardware/cluster.py

Function	Unhandled Issue
run	ValueError: Error checking server: Internal Server Error. Is the server running? ... Event Count: 5

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[carolineechen]

• Update conda env run commands #920 👈
• main

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