Adding remote write for memcache

[anphn-mtt]

Description

Added Remote/Write Configs for Memcache metrics:
List of Metrics are on following page:

https://github.com/influxdata/telegraf/tree/master/plugins/inputs/memcache

Metrics follow following formart

        ## memcached_accepting_conns
        ## memcached_auth_cmds
        ## memcached_auth_errors
        ## memcached_bytes
        ## memcached_bytes_read
        ## memcached_bytes_written
        ## memcached_cas_*
        ## memcached_cas_*
        ## memcached_cmd_*
        ## memcached_cmd_flush
        ## memcached_cmd_get
        ## memcached_cmd_set
        ## memcached_cmd_touch
        ## memcached_conn_yields
        ## memcached_connection_structures
        ## memcached_curr_connections
        ## memcached_curr_items
        ## memcached_decr_*
        ## memcached_delete_*
        ## memcached_evictions
        ## memcached_get_hits
        ## memcached_get_misses
        ## memcached_hash_bytes
        ## memcached_hash_is_expanding
        ## memcached_incr_*
        ## memcached_limit_maxbytes
        ## memcached_listen_disabled_num
        ## memcached_reclaimed
        ## memcached_threads
        ## memcached_total_connections
        ## memcached_total_items
        ## memcached_uptime

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Testing performed

• Redeploy fluentd and fluentd-events pods
• Confirm events, logs, and metrics are coming in

[pmalek-sumo]

Change seems fine, just one small question