refactor: change binary lists in mysql mocks to base64 strings for readability

[Hermione2408]

Related Issue

1. ‘look by kind’changes in mysql so that It doesn't get different packet from config mock.
2. encoding/decoding of packets to base64.
   Closes: #[issue number that will be closed through this PR]

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[sweep-ai]

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• Apply: All new business logic should have corresponding unit tests.
• Apply: Refactor large functions to be more modular.
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[Sarthak160]

Function can be defined outside and better be named as GetFirstMysqlMock and I guess we should also compare the mock with some properties, instead of impetuously returning the first mock. Reason behind can be the case where fist mock written in the yaml itself is not the initial handshake mock .

[Sarthak160]

Also make this field into base46 as well -

 message:
            capability_flags: 423535119
            max_packet_size: 16777215
            character_set: 255
            reserved:
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                - 0
                

[Sarthak160]

Also since we have implemented memDb for handling mvcc in the mock transactions, It's beneficiary to use the newly introduced method h.DeleteTCSmocks from the PR #1214 instead of just slicing down the index which can cause race condition when two different parsers try to access the same mocks object at same time.
So After that PR gets merged to main you can also replace your logic for deleting mocks to just h.DeleteTcsMock(matchedMock).

			matchedIndex := 0
			matchedReqIndex := 0
			configMocks[matchedIndex].Spec.MySqlResponses = append(configMocks[matchedIndex].Spec.MySqlResponses[:matchedReqIndex], configMocks[matchedIndex].Spec.MySqlResponses[matchedReqIndex+1:]...)
			if len(configMocks[matchedIndex].Spec.MySqlResponses) == 0 {
				configMocks = (append(configMocks[:matchedIndex], configMocks[matchedIndex+1:]...))
			}

[Hermione2408]

Okay will make the changes once PR 1214 gets merged

[Sarthak160]

@Hermione2408 you can make the above changes as the PR has been merged for the deleteTCS mocks

[Sarthak160]

LGTM