feat: Add ignore changes on tags to elasticbeanstalk:shared-elb-environment-count

[mnival]

Description

Add ignore_changes to aws_lb.

Motivation and Context

To avoid this situation when we have a shared ALB with ElasticBeanstalk

  ~ resource "aws_lb" "this" {
        id                                          = "arn:aws:elasticloadbalancing:xxx:xxxx:loadbalancer/app/shared-alb/xxx"
        name                                        = "shared-alb"
      ~ tags                                        = {
          - "elasticbeanstalk:shared-elb-environment-count" = "1" -> null
            "terraform-aws-modules"                         = "alb"
        }
      ~ tags_all                                    = {
          - "elasticbeanstalk:shared-elb-environment-count" = "1" -> null
            # (4 unchanged elements hidden)
        }
        # (21 unchanged attributes hidden)

        # (5 unchanged blocks hidden)
    }```

Breaking Changes

No.

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

[bryantbiggs]

do we know if this change works as intended? what are the downsides of ignoring this?

[mnival]

Hello,
I tested in my environment and I didn't see any regression.
This tag is describe here: https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/environments-cfg-alb-shared.html
I saw no disadvantage in ignoring it because this tag is added by AWS when we implement a shared ALB in ElasticBeanstalk

[antonbabenko]

This PR is included in version 9.2.0 🎉

[github-actions]

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