globalGqlIdentifierName is inconsistently forced lowercase so doesn't work with mixed case identifiers

[fantastiskm]

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Describe the bug

globalGqlIdentifierName are set to be lower case in tag-pluck but when the visitor uses them it does a case sensitive compare

To Reproduce Steps to reproduce the behavior:

pluckConfig: {
globalGqlIdentifierName: ['helloGql']
}

const query = helloGql(`
[snip]
`);

Expected behavior

Case sensitive identifiers can match. Either globalGqlIdentifierName shouldn't be converted to lower case or identifiers in the code should be. Changing the comparison to be case insensitive should not break backward compatibility whereas changing it to be case sensitive may.

Environment:

• OS: MacOs
• @graphql-tools/...: 8.3
• NodeJS: 18

Additional context

[fantastiskm]

#5945