Consistent use of "Total Series" instead of "Cardinality"

We are inconsistently using the terms 'total series' and 'cardinality' interchangeably, causing confusion for the user.

REQUIRES DESIGN REVIEW
-- Review every location we use these terms
-- Determine if 'total series' is the correct term to use consistently
-- Affects InfluxDB Cloud, OSS, Quartz, Marketing Pages, Docs (so, non-trivial)

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.

1. ...
2. ...
3. ...

__Expected behavior:__
Describe what you expected to happen.

__Actual behavior:__
Describe What actually happened.

__Environment info:__

* System info: Run `uname -srm` and copy the output here
* InfluxDB version: Run `influxd version` and copy the output here
* Other relevant environment details: Container runtime, disk info, etc

__Config:__
Copy any non-default config values here or attach the full config as a gist or file.

__Logs:__
Include snippet of errors in log.

__Performance:__
Generate profiles with the following commands for bugs related to performance, locking, out of memory (OOM), etc.

```sh
# Commands should be run when the bug is actively happening.
# Note: This command will run for at least 30 seconds.
curl -o profiles.tar.gz "http://localhost:8086/debug/pprof/all?cpu=true"
curl -o vars.txt "http://localhost:8086/debug/vars"
iostat -xd 1 30 > iostat.txt
# Attach the `profiles.tar.gz`, `vars.txt`, and `iostat.txt` output files.
```