chore: remove v10 and some v8 migration tests that use nodejs 14.x

[sobolk]

Description of changes

This PR removes tests that use old version of CLI that tries to deploy Node 14.x lambdas.

The reason is that Lambda service no longer allows Node 14.x functions.

I.e.

ESC[KESC[91m    UserPoolClientLambda           AWS::Lambda::Function          CREATE_FAILED                  Tue Feb 20 2024 ESC[39m
ESC[?25h

🛑 ESC[31mThe following resources failed to deploy:ESC[39m

ESC[31mResource Name:ESC[39m UserPoolClientLambda (AWS::Lambda::Function)
ESC[31mEvent Type:ESC[39m create
ESC[31mReason:ESC[39m Resource handler returned message: "The runtime parameter of nodejs14.x is no longer supported for creating or updating AWS Lambda functions. We recommend you use the new runtime (nodejs20.x) while creating or updating functions. (Service: Lambda, Status Code: 400, Request ID: a26c4f9a-2814-49e1-a3b9-add806b06281)" (RequestToken: b6e2c9f8-b6eb-0bb6-12d8-6457775c7c3e, HandlerErrorCode: InvalidRequest)


ESC[31mResource Name:ESC[39m LambdaFunction (AWS::Lambda::Function)
ESC[31mEvent Type:ESC[39m create
ESC[31mReason:ESC[39m Resource handler returned message: "The runtime parameter of nodejs14.x is no longer supported for creating or updating AWS Lambda functions. We recommend you use the new runtime (nodejs20.x) while creating or updating functions. (Service: Lambda, Status Code: 400, Request ID: cb2cac38-f5c1-48dc-b252-cc21dfe86492)" (RequestToken: cfb395a8-bd19-4edf-bbc7-2498a62218e0, HandlerErrorC
ode: InvalidRequest)

Issue #, if available

Description of how you validated changes

E2E tests, PR check

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)
• New AWS SDK calls or CloudFormation actions have been added to relevant test and service IAM policies
• Pull request labels are added

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