dependency updates to upgrade from urllib3 1.26

[mikerobg]

Description of changes:
Update python image version to 3.10, update requirements.txt to use updated boto3 from git, remove urllib3 1.26.

Tested within docker image with custom connector:

curl -X POST "http://localhost:9000/2015-03-31/functions/function/invocations" \
  -H "Content-Type: application/json" \
  -d @test_request.json

{"connectorOwner": "SampleConnector", "connectorName": "SamplePythonSalesforceConnector", "connectorVersion": "1.0", "connectorModes": ["SOURCE", "DESTINATION"], "authenticationConfig": {"isBasicAuthSupported": null, "isApiKeyAuthSupported": null, "isOAuth2Supported": true, "isCustomAuthSupported": null, "oAuth2Defaults": {"tokenURL": ["https://login.salesforce.com/services/oauth2/token", "https://test.salesforce.com/services/oauth2/token"], "authURL": ["https://login.salesforce.com/services/oauth2/authorize", "https://test.salesforce.com/services/oauth2/authorize"], "oAuth2GrantTypesSupported": ["AUTHORIZATION_CODE"], "oAuthScopes": ["api", "refresh_token"], "oAuth2CustomProperties": null, "addBasicAuthHeader": false, "oAuth2ContentType": "URL_ENCODED", "oAuth2MethodType": "HTTP_POST"}, "customAuthConfig": null}, "supportedApiVersions": ["v51.0"], "isSuccess": true, "connectorRuntimeSetting": [{"key": "instanceUrl", "dataType": "String", "required": true, "label": "Salesforce Instance URL", "description": "URL of the instance where user wants to run the operations", "scope": "CONNECTOR_PROFILE", "connectorSuppliedValueOptions": null}, {"key": "is_sandbox_account", "dataType": "Boolean", "required": true, "label": "Type of salesforce account", "description": "Is Salesforce account a sandbox account", "scope": "CONNECTOR_PROFILE", "connectorSuppliedValueOptions": null}], "logoURL": null, "errorDetails": null, "operatorsSupported": ["PROJECTION", "LESS_THAN", "GREATER_THAN", "BETWEEN", "LESS_THAN_OR_EQUAL_TO", "GREATER_THAN_OR_EQUAL_TO", "EQUAL_TO", "CONTAINS", "NOT_EQUAL_TO", "ADDITION", "SUBTRACTION", "MULTIPLICATION", "DIVISION", "MASK_ALL", "MASK_FIRST_N", "MASK_LAST_N", "VALIDATE_NON_NULL", "VALIDATE_NON_ZERO", "VALIDATE_NON_NEGATIVE", "VALIDATE_NUMERIC", "NO_OP"], "triggerFrequenciesSupported": ["BYMINUTE", "HOURLY", "DAILY", "WEEKLY", "MONTHLY", "ONCE"], "supportedWriteOperations": ["INSERT", "UPDATE", "UPSERT"], "supportedTriggerTypes": ["SCHEDULED", "ONDEMAND"]}

curl -s -X POST "http://localhost:9000/2015-03-31/functions/function/invocations" \
  -H "Content-Type: application/json" \
  -d @test_list_entities.json
=== Testing List Entities ===
{"isSuccess": true, "errorDetails": null, "entities": [{"entityIdentifier": "AIApplication", "hasNestedEntities": false, "isWritable": false, "label": "AI Application", "description": "AI Application"},
...

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