Added bootstarter and autoconfiguration for gemfire vector store

[geetrawat]

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[geetrawat]

I also puzzled by the following the GemFireVectorStore code:

• The GemFireVectorStore#topK is not used.
• The GemFireVectorStore#GemFireVectorStoreConfigBuilder#connectionTimeout, GemFireVectorStore#GemFireVectorStoreConfigBuilder#requestTimeout are never used.
• None of the CreateRequest setters is ever used? Actually none of the fields is every used. And given that this is a privet class, what is the purpose of adding those fields?

removed the connectionTimeout and requestTimeout and utilized other properties.

[geetrawat]

We are creating a new improved PR.