fix: [#4684] ESLint issues in botbuilder-lg

[ceciliaavila]

Addresses #4684
#minor

Description

This PR fixes the new ESLint errors and warnings after upgrading the ESLint packages in the botbuilder-lg project.

Specific Changes

• Removed the 'only-warnings' plugin from 'botbuilder-lg/eslint.config.cjs' file and the related dependency.
• Applied the auto fix flag for most issues (spacing, trailing commas, indentation, and removing unnecessary eslint exceptions).
• Applied manual fixes for new rules like 'no-require-imports'.

Testing

The following images show the number of issues fixed in the library and the tests passing after the changes.

[coveralls]

Pull Request Test Coverage Report for Build 12084447514

Details

• 122 of 161 (75.78%) changed or added relevant lines in 6 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.005%) to 84.686%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
libraries/botbuilder-lg/src/evaluator.ts	73	74	98.65%
libraries/botbuilder-lg/src/extractor.ts	1	2	50.0%
libraries/botbuilder-lg/src/expander.ts	44	81	54.32%

Files with Coverage Reduction	New Missed Lines	%
libraries/botbuilder-lg/src/customizedMemory.ts	1	96.77%
libraries/botbuilder-lg/src/expander.ts	2	72.57%

Totals
Change from base Build 12051547941:	-0.005%
Covered Lines:	20528
Relevant Lines:	23085

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💛 - Coveralls