[Improvement]: Support PKCS12 keystores with WSO2 MI

[Sumudu-Sahan]

Description

Currently, the WSO2 MI does not support PKCS12 keystores and only supports JKS keystores.

Describe your problem(s)

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Describe your solution(s)

Need to provide support for the PKCS12 keystores.

Related issue(s) (optional)

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Suggested label(s) (optional)

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Suggested assignee(s) (optional)

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