fix(microservices): prevent kafka parser from modifying received message

[jDzames]

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• 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)
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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?

Kafka parser modifies messages during parsing. If a message handler fails and message is retried by KafkaJS, then the already parsed message is parsed again and the value ends up being the string '[object Object]'.

Issue Number: 9956

What is the new behavior?

Kafka parser duplicates message objects and puts parsed data into these newly created objects. So retries are executed with the same data.

Does this PR introduce a breaking change?

• Yes
• No

Other information

fix: #9956

[coveralls]

Pull Request Test Coverage Report for Build 85dd6edf-0e26-4af1-a38d-30d84abbec45

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0009%) to 94.024%

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Totals
Change from base Build 8ef0dd2b-a478-4378-b9d0-9a314f70870c:	0.0009%
Covered Lines:	6057
Relevant Lines:	6442

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💛 - Coveralls

[jDzames]

(lint failure is caused by var CompressionCodecs in kafka.interface.ts, it was there already - do we want to do sth about it?)
EDIT: lint failure fixed (rebased branch)

[Tony133]

Hi @jDzames, CompressionCodecs in kafka.interface.ts, has been fixed in this PR #9991

[kamilmysliwiec]

LGTM