adding hostname support for notifications deny list

[toepkerd]

Description

Adds support for checking hostnames in a customer's deny list, in addition to the existing functionality of checking IP addresses.

Issues Resolved

Check List

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[toepkerd]

In regards to the failing CIs, when built locally, the repo with my changes stashed away failed on the same BWC task for the same reasons:

:notifications:notificationsBwcCluster#mixedClusterTask
Caused by: org.opensearch.gradle.testclusters.TestClustersException: `cluster{:notifications:notificationsBwcCluster0}` failed to wait for cluster health yellow after 40 SECONDS
  IO error while waiting cluster
  503 Service Unavailable

[sbcd90]

can we add a test case which demonstrates the additional checks hostname.equals is doing other than normal string.equals?

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/notifications/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/notifications/backport-2.x
# Create a new branch
git switch --create backport/backport-858-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 39bd3bf824573ad730345f0f2cc9a3cda5be32a4
# Push it to GitHub
git push --set-upstream origin backport/backport-858-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/notifications/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-858-to-2.x.

[opensearch-trigger-bot]

The backport to 2.12 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/notifications/backport-2.12 2.12
# Navigate to the new working tree
pushd ../.worktrees/notifications/backport-2.12
# Create a new branch
git switch --create backport/backport-858-to-2.12
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 39bd3bf824573ad730345f0f2cc9a3cda5be32a4
# Push it to GitHub
git push --set-upstream origin backport/backport-858-to-2.12
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/notifications/backport-2.12

Then, create a pull request where the base branch is 2.12 and the compare/head branch is backport/backport-858-to-2.12.