Inconsistent SINTER: support for single-key parameter

[arushi-08]

Steps to reproduce

127.0.0.1:7379> SADD set1 "a" "b" "c"
127.0.0.1:7379> SINTER set1

Expected output

The expected output when the above command is run on Redis. Essentially returns all members of the set associated with given key (same as SMEMBERS cmd)

1) "a"
2) "b"
3) "c"

Observed output

The observed output when the above command is run on DiceDB.

(error) ERROR wrong number of arguments for 'sinter' command

Expectations for resolution

This issue will be considered resolved when the following things are done

1. changes in the dice code to meet the expected behavior
2. addition of relevant test case to ensure we catch the regression

You can find the tests under the integration_tests directory of the dice repository and the steps to run are in the README file. Refer to the following links to set up DiceDB and Redis 7.2.5 locally

• setup DiceDB locally
• setup Redis 7.2.5 locally
• setup DiceDB CLI