fix: #13077 KafkaJs typing consistency

[edeesis]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Incompatible typing between the KafkaJs and Nest Kafka Microservice types.

Issue Number: #13077

What is the new behavior?

This will change the SASL Mechanism to be compatible types.

Does this PR introduce a breaking change?

• Yes
• No

While technically this is a breaking change, since we Object.assign, the current signature actually won't work: https://github.com/edeesis/nest/blob/master/packages/microservices/server/server-kafka.ts#L114-L118.

The signature change was introduced in kafkajs 2.2.1.

Other information

[coveralls]

Pull Request Test Coverage Report for Build 1fe0a501-248d-4b5d-99c3-71f2989b8bfa

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 92.1%

---

Totals
Change from base Build 11e860cb-424d-4422-878c-e23b0381b86b:	-0.1%
Covered Lines:	6715
Relevant Lines:	7291

---

💛 - Coveralls

[kamilmysliwiec]

lgtm