[chore] Prepare release v1.6.0/v0.99.0

[opentelemetrybot]

The following commands were run to prepare this release:

• make chlog-update VERSION=v1.6.0/v0.99.0
• make prepare-release PREVIOUS_VERSION=1.5.0 RELEASE_CANDIDATE=1.6.0 MODSET=stable
• make prepare-release PREVIOUS_VERSION=0.98.0 RELEASE_CANDIDATE=0.99.0 MODSET=beta

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 91.56%. Comparing base (b473034) to head (3c68225).

Files	Patch %	Lines
cmd/otelcorecol/main.go	0.00%	15 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #10018 +/- ## ========================================== - Coverage 91.62% 91.56% -0.07% ========================================== Files 360 360 Lines 16681 16695 +14 ========================================== + Hits 15284 15286 +2 - Misses 1060 1073 +13 + Partials 337 336 -1 ```

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