fix: Added missing env variables in main.bicep for function app

[Prasanjeet-Microsoft]

Purpose

Added azureOpenAISystemMessage and azureSearchTopK param in main.bicep files for function app to set/update the value of AZURE_SEARCH_TOP_K and AZURE_OPENAI_SYSTEM_MESSAGE env variable in azure function app using azd env set and azd up command

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

Run below commands from VS code powershell terminal:

azd env refresh
azd set AZURE_OPENAI_SYSTEM_MESSAGE "You help people find all the information."
azd up

SSH to the function app:
echo $AZURE_OPENAI_SYSTEM_MESSAGE

Check whether you are able to see the expected SYSTEM_MESSAGE.

Please find below screenshot for your reference:

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
TOTAL	2645	583	77%

report-only-changed-files is enabled. No files were changed during this commit :)

Tests	Skipped	Failures	Errors	Time
298	0 💤	0 ❌	0 🔥	39.320s ⏱️

[github-actions]

🎉 This PR is included in version 1.9.3 🎉

The release is available on GitHub release

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