Restart all metrics on config change

[vitus133]

This commit adds an explicit cloud-event-proxy (CEP) sidecar restart on the daemon's command. The command is send after any reconfiguration. Upon this command, the sidecar exec's itself and re-reads all the configurations. This eliminates the need for incremental and selective metric cleanup that has proven complex and error-prone.

/cc @jzding @lack @josephdrichard @nocturnalastro @greyerof @edcdavid

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In response to this:

This commit adds an explicit cloud-event-proxy (CEP) sidecar restart on the daemon's command. The command is send after any reconfiguration. Upon this command, the sidecar exec's itself and re-reads all the configurations. This eliminates the need for incremental and selective metric cleanup that has proven complex and error-prone.

/cc @jzding @lack @josephdrichard @nocturnalastro @greyerof @edcdavid

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