vterm mode: Key sequence C-c C-z starts with non-prefix key C-c

[muralikodali]

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message buffer showing the following error with the key mapping related to vterm-mode binding to a function evil-collection-vterm-toggle-send-escape

evil-collection: error setting key in vterm-mode-map (error "Key sequence C-c C-z starts with non-prefix key C-c")

keeping C-c C-z key in block list keeps this message away from appearing in message buffer.