fix(AWS SES Node): Encode template parameters properly

[riascho]

This PR ensures proper encoding for the template params used in createTemplate and updateTemplate. This is to improve the handling of special characters being passed in.

Related Linear tickets, Github issues, and Community forum posts

• https://linear.app/n8n/issue/NODE-2475/aws-ses-node-puts-html-content-in-path-instead-of-body

Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

[codecov]

Codecov Report

Attention: Patch coverage is 28.57143% with 5 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/nodes-base/nodes/Aws/SES/AwsSes.node.ts	28.57%	5 Missing ⚠️

📢 Thoughts on this report? Let us know!

[ShireenMissi]

Tested manually and it works, just need to fix the unit tests

[ShireenMissi]

LGTM 🎉

[cypress]

n8n    Run #9699

Run Properties:   Passed #9699  •  1cb4d4a0e0: 🌳 🖥️ browsers:node18.12.0-chrome107 🤖 riascho 🗃️ e2e/*

Project	n8n
Branch Review	node-2475-aws-ses-node-create-template-bug
Run status	Passed #9699
Run duration	04m 42s
Commit	1cb4d4a0e0: 🌳 🖥️ browsers:node18.12.0-chrome107 🤖 riascho 🗃️ e2e/*
Committer	Shireen Missi
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	0
Pending	5
Skipped	0
Passing	441
View all changes introduced in this branch ↗︎

[github-actions]

✅ All Cypress E2E specs passed