docs: Update the complete-alb example to apply without errors

[flora-five]

Description

The complete-alb example needs a few fixes to apply without errors.

Motivation and Context

terraform apply returns a warning and some errors:

╷
│ Warning: Invalid Attribute Combination
│ 
│   with module.alb.aws_lb_target_group.this["ex-lambda-with-trigger"],
│   on ../../main.tf line 578, in resource "aws_lb_target_group" "this":
│  578:   port                               = each.value.target_type == "lambda" ? null : coalesce(each.value.port, var.default_port)
│ 
│ Attribute "port" cannot be specified when "target_type" is "lambda".
│ 
│ This will be an error in a future release.
│ 
│ (and one more similar warning elsewhere)
╵
╷
│ Error: Missing required argument
│ 
│   with module.alb.aws_lb_listener_rule.this["ex-http-https-redirect/ex-weighted-forward"],
│   on ../../main.tf line 299, in resource "aws_lb_listener_rule" "this":
│  299: resource "aws_lb_listener_rule" "this" {
│ 
│ The argument "action.0.forward.0.target_group.0.arn" is required, but no
│ definition was found.
╵
╷
│ Error: Missing required argument
│ 
│   with module.alb.aws_lb_listener_rule.this["ex-http-https-redirect/ex-weighted-forward"],
│   on ../../main.tf line 299, in resource "aws_lb_listener_rule" "this":
│  299: resource "aws_lb_listener_rule" "this" {
│ 
│ The argument "action.0.forward.0.target_group.1.arn" is required, but no
│ definition was found.
╵
╷
│ Error: Only one of host_header, http_header, http_request_method, path_pattern, query_string or source_ip can be set in a condition block
│ 
│   with module.alb.aws_lb_listener_rule.this["ex-https/ex-weighted-forward"],
│   on ../../main.tf line 299, in resource "aws_lb_listener_rule" "this":
│  299: resource "aws_lb_listener_rule" "this" {
│ 

Breaking Changes

None

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects
• I have executed pre-commit run -a on my pull request

[antonbabenko]

This PR is included in version 10.0.1 🎉

[github-actions]

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