[hec-assembler]: Optimize linking at cinst/minst levels

[joserochh]

Proposed changes

Optimize linking removing unnecessary memory transactions at cinst (for metadata) and minst levels.

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (if none of the other choices apply)

Checklist

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• Any dependent changes have been merged and published in downstream modules

Further comments

With this implementation an minst from multi-individual kernel operations linking looks pretty much the same as an minst from a big unified multi op kernel. That was also achieved at .mem level on previous PR and it partially achieved now at cinst level by removing metadata memory transactions.

Apart from the unit-tests integration tests have been added to validate the entire linking flow.