Revert "Mute org.elasticsearch.index.IndexingPressureIT testWriteCanBeRejectedAtPrimaryLevel #131151"

[Copilot]

This PR reverts commit 6f0ed56307a21eb2ed7d6f61219680abdcd22357 which muted the test org.elasticsearch.index.IndexingPressureIT.testWriteCanBeRejectedAtPrimaryLevel due to issue #131151.

What was changed

The original commit added a mute entry to muted-tests.yml to disable the failing test. This revert removes that mute entry, allowing the test to run again.

Removed from muted-tests.yml:

- class: org.elasticsearch.index.IndexingPressureIT
  method: testWriteCanBeRejectedAtPrimaryLevel
  issue: https://github.com/elastic/elasticsearch/issues/131151

Impact

• The testWriteCanBeRejectedAtPrimaryLevel test in IndexingPressureIT will now be executed as part of the test suite
• This unmutes a test that was previously disabled, potentially revealing if the underlying issue has been resolved
• No functional code changes - only test execution behavior is affected

The revert is clean and only removes the exact lines that were added in the original muting commit.

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[elasticsearchmachine]

@copilot-swe-agent please enable the option "Allow edits and access to secrets by maintainers" on your PR. For more information, see the documentation.

[elasticsearchmachine]

Pinging @elastic/es-distributed-indexing (Team:Distributed Indexing)

[lkts]

buildkite test this