[Backport 2.x] Fix bucket selector aggregation writeable name. (#1780)

[AWSHurneyt]

Description

Manual backport of PR #1780

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[AWSHurneyt]

./gradlew build succeeded locally.

> Task :alerting:integTest
Jan 28, 2025 8:47:32 PM sun.util.locale.provider.LocaleProviderAdapter <clinit>
WARNING: COMPAT locale provider will be removed in a future release

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.5/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD SUCCESSFUL in 34m 19s
63 actionable tasks: 62 executed, 1 up-to-date