TDigest: Implement `TDIGEST.TRIMMED_MEAN` command

[LindaSummer]

Search before asking

• I had searched in the issues and found no similar issues.

Motivation

Refer: #2558
We should implement TDIGEST.TRIMMED_MEAN command.

Redis command reference:
https://redis.io/docs/latest/commands/tdigest.trimmed_mean/

Solution

Depends on #2791 #2792.

Follow the implementation of #2794 for this command.

Are you willing to submit a PR?

• I'm willing to submit a PR!