Influx - Upgrade from 2.7 to 3.x

- Installation script to install Influx3.x

- Token file changes for Telegraf & Grafana

The changes has been tested locally.
[root@localhost opt]# systemctl status influxdb3

● influxdb3.service - InfluxDB 3.x Service

     Loaded: loaded (/etc/systemd/system/influxdb3.service; enabled; preset: disabled)

     Active: active (running) since Wed 2025-08-13 17:06:22 IST; 21min ago

   Main PID: 4798 (influxdb3)

      Tasks: 13 (limit: 36012)

     Memory: 50.7M

        CPU: 2.160s

     CGroup: /system.slice/influxdb3.service

             └─4798 /usr/local/bin/influxdb3 serve --node-id=node0 --object-store=file --data-dir /var/lib/influxdb --http-bind=0.0.0.0:8181
Aug 13 17:06:22 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:22.678470Z  INFO influxdb3_wal::object_store: completed replaying wal files time_taken=10.345µs

Aug 13 17:06:22 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:22.678489Z  INFO influxdb3_lib::commands::serve: setting up background mem check for query buffer

Aug 13 17:06:22 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:22.678493Z  INFO influxdb3_lib::commands::serve: setting up telemetry store

Aug 13 17:06:22 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:22.678587Z  INFO influxdb3_write::deleter: Started catalog hard deleter task. delete_grace_period=86400s

Aug 13 17:06:23 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:23.714494Z  INFO influxdb3_lib::commands::serve: setting up server with authz disabled for paths paths_without_authz=[]

Aug 13 17:06:23 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:23.714572Z  INFO influxdb3_server: startup time: 1045ms address=0.0.0.0:8181

Aug 13 17:06:37 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:37.688480Z  INFO influxdb3_catalog::object_store: persisted next catalog sequence put_result=PutResult { e_tag: Some(">

Aug 13 17:06:37 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:37.760969Z  INFO influxdb3_catalog::catalog::update: create database name="amp_database"

Aug 13 17:06:37 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:37.761123Z  INFO influxdb3_catalog::catalog: creating new database database_name="amp_database"

Aug 13 17:06:37 localhost.localdomain influxdb3[4798]: 2025-08-13T11:36:37.761436Z  INFO influxdb3_catalog::object_store: persisted next catalog sequence put_result=PutResult { e_tag: Some(">

[root@localhost opt]#