chore: removed ignored attributes computed by aws provider

[moritzzimmer]

this will silence those terraform warnings:

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│ Warning: Redundant ignore_changes element
│ 
│   on ../../main.tf line 79, in resource "aws_lambda_function" "lambda_external_lifecycle":
│   79: resource "aws_lambda_function" "lambda_external_lifecycle" {
│ 
│ Adding an attribute name to ignore_changes tells Terraform to ignore future changes to the argument in configuration after the object has been created, retaining the value originally configured.
│ 
│ The attribute version is decided by the provider alone and therefore there can be no configured value to compare with. Including this attribute in ignore_changes has no effect. Remove the attribute from ignore_changes to quiet this warning.
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