Add SASL/GSSAPI and SASL/OAUTHBEARER back to doc

[WanYixian]

Info

• Description

  • Before, this part was removed because Change required: remove SASL/GSSAPI & SASL/OAUTHBEARER from Kafka source & sink documents #865,
  • Now we can add it back since user in community encountered it
  • See preview Kafka Source and Kafka Sink

• Related code PR

  • feat(source): enable SASL for Kafka connector risingwave#5693

• Related doc issue

  Resolves Missing docs for Kafka source/sink + kerberos #2151

For reviewers

• Preview

  • Source
  • Sink

• Key points

  • [ Parts that may need revision or extra consideration. ]

Before merging

• I have checked the doc site preview, and the updated parts look good.

• I have acquired the approval from the owner (and optionally the reviewers) of the code PR and at least one tech writer (CharlieSYH, emile-00, & hengm3467).

[aws-amplify-us-east-1]

This pull request is automatically being deployed by Amplify Hosting (learn more).

Access this pull request here: https://pr-2160.d2fbku9n2b6wde.amplifyapp.com

[fuyufjh]

LGTM

[tabVersion]

I'd prefer adding AWS_MSK_IAM together with GSSAPI and OAUTHBEARER.
related: risingwavelabs/risingwave#16625

[WanYixian]

I'd prefer adding AWS_MSK_IAM together with GSSAPI and OAUTHBEARER. related: risingwavelabs/risingwave#16625

Thanks! Will use another PR to track #2158 it. So merge this PR for now.