feat: Adding VoyageAI's v3.5 models

[fzowl]

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[elasticsearchmachine]

Pinging @elastic/ml-core (Team:ML)

[davidkyle]

LGTM

[davidkyle]

@elasticmachine test this please

[davidkyle]

@fzowl the PR requires a changelog entry usually this is auto generated but not today for some reason. I wasn't able to push a commit adding the changelog to your branch, please can you apply the patch below to add the changelog. Thanks

From bb8829b0e6a7d922df60f26091ee849c4343426b Mon Sep 17 00:00:00 2001
From: David Kyle <david.kyle@elastic.co>
Date: Thu, 22 May 2025 13:37:23 +0100
Subject: [PATCH] add changelog

---
 docs/changelog/128241.yaml | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 docs/changelog/128241.yaml

diff --git a/docs/changelog/128241.yaml b/docs/changelog/128241.yaml
new file mode 100644
index 00000000000..a5233571e71
--- /dev/null
+++ b/docs/changelog/128241.yaml
@@ -0,0 +1,5 @@
+pr: 128241 
+summary: Add VoyageAI's v3.5 models
+area: Machine Learning
+type: enhancement
+issues: []
-- 
2.45.2

[fzowl]

@davidkyle I added the file, can you please take a look?

[davidkyle]

@elasticmachine test this please

[davidkyle]

Thanks for adding the change log entry @fzowl, because of that this enhancement will appear in the release notes

[elasticsearchmachine]

💚 Backport successful

Status	Branch	Result
✅	8.19