fix(sagemaker): Fix host identification issue after restarting a Space

[dylanraws]

Problem

Users will face a host identification issue when reconnecting to a Space after restarting it, if the Space name has capital letters. This occurs because the Space's hostname is written to the known_hosts file in lowercase, but hostname matching during reconnection is case-sensitive.

Solution

When removing the Space hostname from the known_hosts file, ensure to remove lines that match the lowercase variant of the Space hostname.

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[github-actions]

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[dylanraws]

The linter has identified duplicate code but that is expected for unit tests.