[chore] Remove ecstaskobserver from distro

[pjanotti]

Per conversation removing this component since it was discontinued on OTel Collector Contrib.

[Copilot]

Pull Request Overview

This PR removes the discontinued ecs_task_observer extension from the Splunk OpenTelemetry Collector distribution, following its removal from the upstream OpenTelemetry Collector Contrib repository in PR #43818.

• Removed all references to ecstaskobserver from code, tests, and documentation
• Cleaned up dependencies in go.mod and go.sum
• Added breaking change changelog entry documenting the removal

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
internal/confmapprovider/discovery/discoverer.go	Removed ecstaskobserver import and factory registration from observer factory map
internal/components/components_test.go	Removed ecs_task_observer from expected extensions list in tests
internal/components/components.go	Removed ecstaskobserver import and factory initialization
go.mod	Removed ecstaskobserver dependency from required packages
go.sum	Removed ecstaskobserver checksums
docs/components.md	Removed ecs_task_observer from extensions documentation table
.chloggen/remove-ecstaskobserver.yaml	Added breaking change changelog entry with removal details

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.91%. Comparing base (f283ce6) to head (1f2f9d3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6936      +/-   ##
==========================================
- Coverage   37.96%   37.91%   -0.05%     
==========================================
  Files         367      367              
  Lines       25745    25743       -2     
==========================================
- Hits         9773     9760      -13     
- Misses      15161    15168       +7     
- Partials      811      815       +4     

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