bug: monitoring-installer.sh is unreliable

[arturrez]

while workaround made situation worse ref: https://github.com/ava-labs/avalanche-cli/pull/1742

root@ip-172-31-84-161:/etc/apt# cat sources.list.d/grafana.list 
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main
deb [signed-by=/etc/apt/keyrings/grafana.gpg] https://apt.grafana.com stable main

we should rather

• fix this script to make it reliable or
• stop using this script and maintain our own one

[arturrez]

resolved by https://github.com/ava-labs/avalanche-cli/issues/1786