Add support for PEM /PKCS12 Cert. format

[116davinder]

Ref:

• https://zookeeper.apache.org/doc/r3.8.0/zookeeperAdmin.html
• https://stackoverflow.com/questions/61147479/zookeeper-tls-setup-using-pem-file
• https://sleeplessbeastie.eu/2022/03/02/how-to-secure-the-zookeeper-client-communication/

ssl.keyStore.type and ssl.quorum.keyStore.type : (Java system properties: zookeeper.ssl.keyStore.type and zookeeper.ssl.quorum.keyStore.type) New in 3.5.5: Specifies the file format of client and quorum keystores. Values: JKS, PEM, PKCS12 or null (detect by filename). Default: null. New in 3.6.3, 3.7.0: The format BCFKS was added.