fix(deps): update module go.opentelemetry.io/collector/pdata to v1.28.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
go.opentelemetry.io/collector/pdata	v1.27.0 -> v1.28.0

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Release Notes

open-telemetry/opentelemetry-collector (go.opentelemetry.io/collector/pdata)

v1.28.0

🛑 Breaking changes 🛑

• service: Batch processor telemetry is no longer emitted at "basic" verbosity level (#​7890)
  According to the guidelines, basic-level telemetry should be reserved for core Collector APIs.
  Components such as the batch processor should emit telemetry starting from the "normal" level
  (which is also the default level).

  Migration: If your Collector telemetry was set to level: basic and you want to keep seeing
  batch processor-related metrics, consider switching to level: normal instead.

💡 Enhancements 💡

• service: Add service.AllowNoPipelines feature gate to allow starting the Collector without pipelines. (#​12613)
  This can be used to start with only extensions.

• mdatagen: Delete generated_status.go if the component type doesn't require it. (#​12346)

• componenttest: Improve config struct mapstructure field tag checks (#​12590)
  remain tags and omitempty tags without a custom field name will now pass validation.

• service: include component id/type in start error (#​10426)

• mdatagen: Add deprecation date and migration guide fields as part of component metadata (#​12359)

• confmap: Introduce a new feature flag to allow for merging lists instead of discarding the existing ones. (#​8394, #​8754, #​10370)
  You can enable this option via the command line by running following command:
  otelcol --config=main.yaml --config=extra_config.yaml --feature-gates=-confmap.enableMergeAppendOption

• zpagesextension: Add expvar handler to zpages extension. (#​11081)

🧰 Bug fixes 🧰

• confmap: Maintain nil values when marshaling or unmarshaling nil slices (#​11882)
  Previously, nil slices were converted to empty lists, which are semantically different
  than a nil slice. This change makes this conversion more consistent when encoding
  or decoding config, and these values are now maintained.

• service: do not attempt to register process metrics if they are disabled (#​12098)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.8%. Comparing base (80fa15f) to head (8e64cdb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #6461   +/-   ##
=====================================
  Coverage   81.8%   81.8%           
=====================================
  Files        283     283           
  Lines      24910   24910           
=====================================
+ Hits       20382   20384    +2     
+ Misses      4123    4121    -2     
  Partials     405     405           

see 1 file with indirect coverage changes

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