[3.2.x] Upgrade internal JRE version to jdk8u382

[HeshanSudarshana]

Purpose

This PR upgrades the internal JRE version used to jdk8u382.

Issues

Fixes https://github.com/wso2/product-microgateway/issues/3440

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Maintainers: Check before merge

• [x] Assigned 'Type' label
• [x] Assigned the project
• [x] Validated respective github issues
• [x] Assigned milestone to the github issue(s)