@Spitzeralready shared the place to find policy names / values to enforce the settings you seek here: https://chromeenterprise.google/policies/
Specifically you want the values for https://chromeenterprise.google/policies/#AutofillCreditCardEnabled and https://chromeenterprise.google/policies/#PasswordManagerEnabled where both will be a boolean value false.
Then you need an XML file to upload into JAMF, something that looks like this, which you'll upload to your Jamf Pro configuration profile set to the Applications & Custom Settings payload under the preference domain com.google.Chrome:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>AutofillCreditCardEnabled</key>
<false />
<key>PasswordManagerEnabled</key>
<false />
</dict>
</plist>