fix: Go 1.x runtime is deprecated

[obs-gh-colinhutchinson]

What does this PR do?

Migrates off of Go 1.x runtime

Motivation

Go 1.x is deprecated

Testing

Did a terraform apply and verified the Go runtime changed

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # module.observe_collection.module.observe_lambda.aws_lambda_function.this will be updated in-place
  ~ resource "aws_lambda_function" "this" {
      ~ architectures                  = [
          - "x86_64",
          + "arm64",
        ]
      ~ handler                        = "main" -> "bootstrap"
        id                             = "colin3"
      ~ last_modified                  = "2023-10-03T16:04:12.112+0000" -> (known after apply)
      ~ runtime                        = "go1.x" -> "provided.al2"
      ~ s3_key                         = "lambda/observer/latest.zip" -> "lambda/observer/arm64/latest.zip"
        tags                           = {}
        # (19 unchanged attributes hidden)

      ~ environment {
          ~ variables = {
              + "OBSERVE_COLLECTION_ENDPOINT" = "https://130348791288.collect.observe-eng.com"
              - "OBSERVE_URL"                 = "https://130348791288.collect.observe-eng.com/v1/http" -> null
                # (1 unchanged element hidden)
            }
        }

        # (2 unchanged blocks hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

[obs-gh-colinhutchinson]

cc @bendrucker I had difficulty keeping this logic forward / backwards compatible. Would appreciate if you had a cleaner approach