Create utility file for encoding

[Joe-Abraham]

Add a new utility file that shares the common logic for decoding and encoding based on the base variants.

• Fixes Add from_base32 Presto function #7294
• Dependency - Refactor Base64 class to match coding style #10371
• New presto functions to_base32 and from_base32( Add presto function 'to_base32' #8652 and Add presto function from_base32 and to_base32 #7672) has been raised as subsequent PRs.

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[aditi-pandit]

Thanks @Joe-Abraham.

Can you write some simple unit tests for this code ? Would really help keep the code quality as well as understand your API.

[Joe-Abraham]

@aditi-pandit, I have added the test cases as you suggested. Please have a look.

[czentgr]

Thanks Abe. I have a few comments.

[Yuhta]

Actually why not put this inside Base64.h in the same directly? The name EncoderUtils is also very ambiguous.

[Joe-Abraham]

@Yuhta, The intention is to use EncoderUtils for Base32 encoding and decoding. This will ensure consistency in the logic of these functions and will remove duplicate code.

[Yuhta]

@Joe-Abraham Base32 is just variant of Base64 so we should put them in the same utility class.

[Joe-Abraham]

@Yuhta,
This PR has entire changes that I intend to bring in. I have raised multiple PRs to ease up the review process.

• Pending review reworks - Refactor Base64 class to match coding style #10371
• Fixes Add from_base32 Presto function #7294

It would be great if you could review this.